155031051 has 48 divisors (see below), whose sum is σ = 258716160. Its totient is φ = 82071360.

The previous prime is 155031047. The next prime is 155031053. The reversal of 155031051 is 150130551.

155031051 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 155031051 - 2² = 155031047 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (155031053) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 130681 + ... + 131861.

It is an arithmetic number, because the mean of its divisors is an integer number (5389920).

Almost surely, 2^155031051 is an apocalyptic number.

155031051 is a deficient number, since it is larger than the sum of its proper divisors (103685109).

155031051 is a wasteful number, since it uses less digits than its factorization.

155031051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1264 (or 1257 counting only the distinct ones).

The product of its (nonzero) digits is 375, while the sum is 21.

The square root of 155031051 is about 12451.1465737096. The cubic root of 155031051 is about 537.2044032504.

The spelling of 155031051 in words is "one hundred fifty-five million, thirty-one thousand, fifty-one".