155631057 has 8 divisors (see below), whose sum is σ = 207567360. Its totient is φ = 103724400.

The previous prime is 155630983. The next prime is 155631079. The reversal of 155631057 is 750136551.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 155631057 - 2⁷ = 155630929 is a prime.

It is not an unprimeable number, because it can be changed into a prime (155631257) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12432 + ... + 21582.

It is an arithmetic number, because the mean of its divisors is an integer number (25945920).

Almost surely, 2^155631057 is an apocalyptic number.

It is an amenable number.

155631057 is a deficient number, since it is larger than the sum of its proper divisors (51936303).

155631057 is an equidigital number, since it uses as much as digits as its factorization.

155631057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14823.

The product of its (nonzero) digits is 15750, while the sum is 33.

The square root of 155631057 is about 12475.2177135311. The cubic root of 155631057 is about 537.8965461678.

The spelling of 155631057 in words is "one hundred fifty-five million, six hundred thirty-one thousand, fifty-seven".