155881125 has 32 divisors (see below), whose sum is σ = 288213120. Its totient is φ = 83134800.

The previous prime is 155881123. The next prime is 155881129. The reversal of 155881125 is 521188551.

155881125 is a `hidden beast` number, since 1 + 558 + 81 + 1 + 25 = 666.

It is not a de Polignac number, because 155881125 - 2¹ = 155881123 is a prime.

It is a nialpdrome in base 15.

It is a self number, because there is not a number n which added to its sum of digits gives 155881125.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155881123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19719 + ... + 26468.

It is an arithmetic number, because the mean of its divisors is an integer number (9006660).

Almost surely, 2^155881125 is an apocalyptic number.

155881125 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

155881125 is a deficient number, since it is larger than the sum of its proper divisors (132331995).

155881125 is an equidigital number, since it uses as much as digits as its factorization.

155881125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46211 (or 46195 counting only the distinct ones).

The product of its digits is 16000, while the sum is 36.

The square root of 155881125 is about 12485.2362813044. The cubic root of 155881125 is about 538.1844894108.

The spelling of 155881125 in words is "one hundred fifty-five million, eight hundred eighty-one thousand, one hundred twenty-five".