161330232 has 32 divisors (see below), whose sum is σ = 460944000. Its totient is φ = 46094304.

The previous prime is 161330201. The next prime is 161330233. The reversal of 161330232 is 232033161.

161330232 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 (21).

It is a junction number, because it is equal to n+sod(n) for n = 161330199 and 161330208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161330233) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 479982 + ... + 480317.

It is an arithmetic number, because the mean of its divisors is an integer number (14404500).

Almost surely, 2^161330232 is an apocalyptic number.

161330232 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

161330232 is an abundant number, since it is smaller than the sum of its proper divisors (299613768).

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

161330232 is a wasteful number, since it uses less digits than its factorization.

161330232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 960315 (or 960311 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 21.

The square root of 161330232 is about 12701.5838382463. The cubic root of 161330232 is about 544.3838751753.

Adding to 161330232 its reverse (232033161), we get a palindrome (393363393).

The spelling of 161330232 in words is "one hundred sixty-one million, three hundred thirty thousand, two hundred thirty-two".