239155161 has 32 divisors (see below), whose sum is σ = 376167168. Its totient is φ = 132295680.

The previous prime is 239155157. The next prime is 239155171. The reversal of 239155161 is 161551932.

It is not a de Polignac number, because 239155161 - 2² = 239155157 is a prime.

It is not an unprimeable number, because it can be changed into a prime (239155171) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 180381 + ... + 181701.

It is an arithmetic number, because the mean of its divisors is an integer number (11755224).

Almost surely, 2^239155161 is an apocalyptic number.

239155161 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

239155161 is a deficient number, since it is larger than the sum of its proper divisors (137012007).

239155161 is a wasteful number, since it uses less digits than its factorization.

239155161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1601.

The product of its digits is 8100, while the sum is 33.

The square root of 239155161 is about 15464.6422849027. The cubic root of 239155161 is about 620.7164463258.

The spelling of 239155161 in words is "two hundred thirty-nine million, one hundred fifty-five thousand, one hundred sixty-one".