155531912 has 32 divisors (see below), whose sum is σ = 309403800. Its totient is φ = 73042944.

The previous prime is 155531881. The next prime is 155531917. The reversal of 155531912 is 219135551.

It can be written as a sum of positive squares in 4 ways, for example, as 133310116 + 22221796 = 11546^2 + 4714^2 .

It is not an unprimeable number, because it can be changed into a prime (155531917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 95618 + ... + 97230.

Almost surely, 2^155531912 is an apocalyptic number.

It is an amenable number.

155531912 is a deficient number, since it is larger than the sum of its proper divisors (153871888).

155531912 is a wasteful number, since it uses less digits than its factorization.

155531912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2345 (or 2341 counting only the distinct ones).

The product of its digits is 6750, while the sum is 32.

The square root of 155531912 is about 12471.2434023236. The cubic root of 155531912 is about 537.7822993015.

The spelling of 155531912 in words is "one hundred fifty-five million, five hundred thirty-one thousand, nine hundred twelve".