155621256 has 48 divisors (see below), whose sum is σ = 452575440. Its totient is φ = 44462880.

The previous prime is 155621251. The next prime is 155621273. The reversal of 155621256 is 652126551.

It is not an unprimeable number, because it can be changed into a prime (155621251) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 64990 + ... + 67341.

It is an arithmetic number, because the mean of its divisors is an integer number (9428655).

Almost surely, 2^155621256 is an apocalyptic number.

It is an amenable number.

155621256 is an abundant number, since it is smaller than the sum of its proper divisors (296954184).

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

155621256 is a wasteful number, since it uses less digits than its factorization.

155621256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132354 (or 132343 counting only the distinct ones).

The product of its digits is 18000, while the sum is 33.

The square root of 155621256 is about 12474.8248885505. The cubic root of 155621256 is about 537.8852544311.

The spelling of 155621256 in words is "one hundred fifty-five million, six hundred twenty-one thousand, two hundred fifty-six".