42556530 has 16 divisors (see below), whose sum is σ = 102135744. Its totient is φ = 11348400.

The previous prime is 42556499. The next prime is 42556567. The reversal of 42556530 is 3565524.

It is a super-2 number, since 2×42556530² = 3622116491281800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 1418551 = 42556530 / (4 + 2 + 5 + 5 + 6 + 5 + 3 + 0).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 709246 + ... + 709305.

It is an arithmetic number, because the mean of its divisors is an integer number (6383484).

Almost surely, 2^42556530 is an apocalyptic number.

42556530 is an abundant number, since it is smaller than the sum of its proper divisors (59579214).

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

42556530 is a wasteful number, since it uses less digits than its factorization.

42556530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1418561.

The product of its (nonzero) digits is 18000, while the sum is 30.

The square root of 42556530 is about 6523.5366175105. The cubic root of 42556530 is about 349.1312604403.

The spelling of 42556530 in words is "forty-two million, five hundred fifty-six thousand, five hundred thirty".