161143236 has 48 divisors (see below), whose sum is σ = 420866880. Its totient is φ = 53317440.

The previous prime is 161143217. The next prime is 161143249. The reversal of 161143236 is 632341161.

161143236 is a `hidden beast` number, since 1 + 611 + 43 + 2 + 3 + 6 = 666.

161143236 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9351 + ... + 20241.

It is an arithmetic number, because the mean of its divisors is an integer number (8768060).

Almost surely, 2^161143236 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 161143236, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (210433440).

161143236 is an abundant number, since it is smaller than the sum of its proper divisors (259723644).

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

161143236 is a wasteful number, since it uses less digits than its factorization.

161143236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11041 (or 11033 counting only the distinct ones).

The product of its digits is 2592, while the sum is 27.

The square root of 161143236 is about 12694.2205747340. The cubic root of 161143236 is about 544.1734641817.

Adding to 161143236 its reverse (632341161), we get a palindrome (793484397).

The spelling of 161143236 in words is "one hundred sixty-one million, one hundred forty-three thousand, two hundred thirty-six".