161606232 has 128 divisors (see below), whose sum is σ = 469041600. Its totient is φ = 51508224.

The previous prime is 161606231. The next prime is 161606239. The reversal of 161606232 is 232606161.

It is a super-2 number, since 2×161606232² = 52233148442475648, which contains 22 as substring.

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

It is a junction number, because it is equal to n+sod(n) for n = 161606196 and 161606205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161606231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 583278 + ... + 583554.

Almost surely, 2^161606232 is an apocalyptic number.

161606232 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 161606232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (234520800).

161606232 is an abundant number, since it is smaller than the sum of its proper divisors (307435368).

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

161606232 is a wasteful number, since it uses less digits than its factorization.

161606232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 402 (or 392 counting only the distinct ones).

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

The square root of 161606232 is about 12712.4439821775. The cubic root of 161606232 is about 544.6941380601.

The spelling of 161606232 in words is "one hundred sixty-one million, six hundred six thousand, two hundred thirty-two".