155812552 has 32 divisors (see below), whose sum is σ = 340704000. Its totient is φ = 66775632.

The previous prime is 155812549. The next prime is 155812561. The reversal of 155812552 is 255218551.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25648 + ... + 31135.

It is an arithmetic number, because the mean of its divisors is an integer number (10647000).

Almost surely, 2^155812552 is an apocalyptic number.

It is an amenable number.

155812552 is an abundant number, since it is smaller than the sum of its proper divisors (184891448).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

155812552 is an equidigital number, since it uses as much as digits as its factorization.

155812552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56810 (or 56792 counting only the distinct ones).

The product of its digits is 20000, while the sum is 34.

The square root of 155812552 is about 12482.4898157379. The cubic root of 155812552 is about 538.1055610225.

The spelling of 155812552 in words is "one hundred fifty-five million, eight hundred twelve thousand, five hundred fifty-two".