155157057 has 24 divisors (see below), whose sum is σ = 255123648. Its totient is φ = 89944800.

The previous prime is 155157053. The next prime is 155157071. The reversal of 155157057 is 750751551.

155157057 is a `hidden beast` number, since 1 + 551 + 57 + 0 + 57 = 666.

It is not a de Polignac number, because 155157057 - 2² = 155157053 is a prime.

It is not an unprimeable number, because it can be changed into a prime (155157053) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 31794 + ... + 36347.

It is an arithmetic number, because the mean of its divisors is an integer number (10630152).

Almost surely, 2^155157057 is an apocalyptic number.

It is an amenable number.

155157057 is a deficient number, since it is larger than the sum of its proper divisors (99966591).

155157057 is a wasteful number, since it uses less digits than its factorization.

155157057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68181 (or 68178 counting only the distinct ones).

The product of its (nonzero) digits is 30625, while the sum is 36.

The square root of 155157057 is about 12456.2055618876. The cubic root of 155157057 is about 537.3499066762.

The spelling of 155157057 in words is "one hundred fifty-five million, one hundred fifty-seven thousand, fifty-seven".