232120161 has 56 divisors (see below), whose sum is σ = 428456000. Its totient is φ = 122402016.

The previous prime is 232120153. The next prime is 232120171. The reversal of 232120161 is 161021232.

It is not a de Polignac number, because 232120161 - 2³ = 232120153 is a prime.

It is not an unprimeable number, because it can be changed into a prime (232120151) by changing a digit.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 64590 + ... + 68088.

It is an arithmetic number, because the mean of its divisors is an integer number (7651000).

Almost surely, 2^232120161 is an apocalyptic number.

232120161 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

232120161 is a deficient number, since it is larger than the sum of its proper divisors (196335839).

232120161 is an equidigital number, since it uses as much as digits as its factorization.

232120161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3537 (or 3522 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 232120161 is about 15235.4901791836. The cubic root of 232120161 is about 614.5694309258.

Adding to 232120161 its reverse (161021232), we get a palindrome (393141393).

The spelling of 232120161 in words is "two hundred thirty-two million, one hundred twenty thousand, one hundred sixty-one".