42556155 has 16 divisors (see below), whose sum is σ = 69751584. Its totient is φ = 22142720.

The previous prime is 42556127. The next prime is 42556159. The reversal of 42556155 is 55165524.

It is not a de Polignac number, because 42556155 - 2⁵ = 42556123 is a prime.

It is a super-2 number, since 2×42556155² = 3622052656768050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (42556159) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33984 + ... + 35213.

It is an arithmetic number, because the mean of its divisors is an integer number (4359474).

Almost surely, 2^42556155 is an apocalyptic number.

42556155 is a deficient number, since it is larger than the sum of its proper divisors (27195429).

42556155 is a wasteful number, since it uses less digits than its factorization.

42556155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69246.

The product of its digits is 30000, while the sum is 33.

The square root of 42556155 is about 6523.5078753689. The cubic root of 42556155 is about 349.1302349446.

The spelling of 42556155 in words is "forty-two million, five hundred fifty-six thousand, one hundred fifty-five".