155055504 has 160 divisors (see below), whose sum is σ = 455863680. Its totient is φ = 45121536.

The previous prime is 155055499. The next prime is 155055541. The reversal of 155055504 is 405550551.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1131724 + ... + 1131860.

It is an arithmetic number, because the mean of its divisors is an integer number (2849148).

Almost surely, 2^155055504 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 155055504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (227931840).

155055504 is an abundant number, since it is smaller than the sum of its proper divisors (300808176).

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

155055504 is a wasteful number, since it uses less digits than its factorization.

155055504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 257 (or 251 counting only the distinct ones).

The product of its (nonzero) digits is 12500, while the sum is 30.

The square root of 155055504 is about 12452.1284927518. The cubic root of 155055504 is about 537.2326461273.

The spelling of 155055504 in words is "one hundred fifty-five million, fifty-five thousand, five hundred four".