155158857 has 12 divisors (see below), whose sum is σ = 256135360. Its totient is φ = 88662168.

The previous prime is 155158837. The next prime is 155158873. The reversal of 155158857 is 758851551.

155158857 is a `hidden beast` number, since 1 + 5 + 515 + 88 + 57 = 666.

155158857 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 155158857 - 2¹¹ = 155156809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (155158837) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1231357 + ... + 1231482.

Almost surely, 2^155158857 is an apocalyptic number.

It is an amenable number.

155158857 is a deficient number, since it is larger than the sum of its proper divisors (100976503).

155158857 is a wasteful number, since it uses less digits than its factorization.

155158857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2462852 (or 2462849 counting only the distinct ones).

The product of its digits is 280000, while the sum is 45.

The square root of 155158857 is about 12456.2778148209. The cubic root of 155158857 is about 537.3519846267.

The spelling of 155158857 in words is "one hundred fifty-five million, one hundred fifty-eight thousand, eight hundred fifty-seven".