161620232 has 32 divisors (see below), whose sum is σ = 324235200. Its totient is φ = 75297600.

The previous prime is 161620229. The next prime is 161620247. The reversal of 161620232 is 232026161.

It is a super-2 number, since 2×161620232² = 52242198783467648, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 161620198 and 161620207.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 557 + ... + 17987.

It is an arithmetic number, because the mean of its divisors is an integer number (10132350).

Almost surely, 2^161620232 is an apocalyptic number.

It is an amenable number.

161620232 is an abundant number, since it is smaller than the sum of its proper divisors (162614968).

161620232 is a wasteful number, since it uses less digits than its factorization.

161620232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17517 (or 17513 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 161620232 is about 12712.9946118135. The cubic root of 161620232 is about 544.7098666155.

Adding to 161620232 its reverse (232026161), we get a palindrome (393646393).

The spelling of 161620232 in words is "one hundred sixty-one million, six hundred twenty thousand, two hundred thirty-two".