155922072 has 32 divisors (see below), whose sum is σ = 391776000. Its totient is φ = 51711264.

The previous prime is 155922071. The next prime is 155922089. The reversal of 155922072 is 270229551.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155922071) 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 7 ways as a sum of consecutive naturals, for example, 11548 + ... + 21099.

It is an arithmetic number, because the mean of its divisors is an integer number (12243000).

Almost surely, 2^155922072 is an apocalyptic number.

155922072 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

155922072 is an abundant number, since it is smaller than the sum of its proper divisors (235853928).

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

155922072 is a wasteful number, since it uses less digits than its factorization.

155922072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32855 (or 32851 counting only the distinct ones).

The product of its (nonzero) digits is 12600, while the sum is 33.

The square root of 155922072 is about 12486.8759904149. The cubic root of 155922072 is about 538.2316088873.

The spelling of 155922072 in words is "one hundred fifty-five million, nine hundred twenty-two thousand, seventy-two".