155900055 has 32 divisors (see below), whose sum is σ = 257413824. Its totient is φ = 80510976.

The previous prime is 155900029. The next prime is 155900071. The reversal of 155900055 is 550009551.

155900055 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 155900055 - 2⁷ = 155899927 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 155899995 and 155900031.

It is a congruent number.

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, 142089 + ... + 143181.

It is an arithmetic number, because the mean of its divisors is an integer number (8044182).

Almost surely, 2^155900055 is an apocalyptic number.

155900055 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

155900055 is a deficient number, since it is larger than the sum of its proper divisors (101513769).

155900055 is a wasteful number, since it uses less digits than its factorization.

155900055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1395.

The product of its (nonzero) digits is 5625, while the sum is 30.

The square root of 155900055 is about 12485.9943536748. The cubic root of 155900055 is about 538.2062740026.

The spelling of 155900055 in words is "one hundred fifty-five million, nine hundred thousand, fifty-five".