161237430 has 48 divisors (see below), whose sum is σ = 421924464. Its totient is φ = 42719040.

The previous prime is 161237423. The next prime is 161237437. The reversal of 161237430 is 34732161.

161237430 is a `hidden beast` number, since 1 + 612 + 3 + 7 + 43 + 0 = 666.

161237430 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (161237423) and next prime (161237437).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 161237394 and 161237403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161237437) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8425 + ... + 19835.

It is an arithmetic number, because the mean of its divisors is an integer number (8790093).

Almost surely, 2^161237430 is an apocalyptic number.

161237430 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 161237430, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (210962232).

161237430 is an abundant number, since it is smaller than the sum of its proper divisors (260687034).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161237430 is a wasteful number, since it uses less digits than its factorization.

161237430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11581 (or 11578 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 27.

The square root of 161237430 is about 12697.9301462876. The cubic root of 161237430 is about 544.2794731636.

Adding to 161237430 its reverse (34732161), we get a palindrome (195969591).

The spelling of 161237430 in words is "one hundred sixty-one million, two hundred thirty-seven thousand, four hundred thirty".