155431252 has 12 divisors (see below), whose sum is σ = 276615360. Its totient is φ = 76398296.

The previous prime is 155431247. The next prime is 155431253. The reversal of 155431252 is 252134551.

It is a self number, because there is not a number n which added to its sum of digits gives 155431252.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155431253) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 329068 + ... + 329539.

It is an arithmetic number, because the mean of its divisors is an integer number (23051280).

Almost surely, 2^155431252 is an apocalyptic number.

It is an amenable number.

155431252 is a deficient number, since it is larger than the sum of its proper divisors (121184108).

155431252 is a wasteful number, since it uses less digits than its factorization.

155431252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 658670 (or 658668 counting only the distinct ones).

The product of its digits is 6000, while the sum is 28.

The square root of 155431252 is about 12467.2070649364. The cubic root of 155431252 is about 537.6662569878. Note that the first 3 decimals are identical.

The spelling of 155431252 in words is "one hundred fifty-five million, four hundred thirty-one thousand, two hundred fifty-two".