155115057 has 8 divisors (see below), whose sum is σ = 207315360. Its totient is φ = 103162400.

The previous prime is 155115043. The next prime is 155115073. The reversal of 155115057 is 750511551.

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

It is a cyclic number.

It is not a de Polignac number, because 155115057 - 2⁷ = 155114929 is a prime.

It is a super-2 number, since 2×155115057² = 48121361816226498, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (155115757) 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, 60444 + ... + 62957.

It is an arithmetic number, because the mean of its divisors is an integer number (25914420).

Almost surely, 2^155115057 is an apocalyptic number.

It is an amenable number.

155115057 is a deficient number, since it is larger than the sum of its proper divisors (52200303).

155115057 is a wasteful number, since it uses less digits than its factorization.

155115057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123823.

The product of its (nonzero) digits is 4375, while the sum is 30.

The square root of 155115057 is about 12454.5195411144. The cubic root of 155115057 is about 537.3014165994.

The spelling of 155115057 in words is "one hundred fifty-five million, one hundred fifteen thousand, fifty-seven".