161232155 has 32 divisors (see below), whose sum is σ = 228096000. Its totient is φ = 107114112.

The previous prime is 161232121. The next prime is 161232163. The reversal of 161232155 is 551232161.

161232155 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 161232155 - 2⁶ = 161232091 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 223886 + ... + 224604.

It is an arithmetic number, because the mean of its divisors is an integer number (7128000).

Almost surely, 2^161232155 is an apocalyptic number.

161232155 is a deficient number, since it is larger than the sum of its proper divisors (66863845).

161232155 is a wasteful number, since it uses less digits than its factorization.

161232155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 923.

The product of its digits is 1800, while the sum is 26.

The square root of 161232155 is about 12697.7224335705. The cubic root of 161232155 is about 544.2735375990.

The spelling of 161232155 in words is "one hundred sixty-one million, two hundred thirty-two thousand, one hundred fifty-five".