42556913 has 8 divisors (see below), whose sum is σ = 48724032. Its totient is φ = 36411696.

The previous prime is 42556909. The next prime is 42556931. The reversal of 42556913 is 31965524.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 42556913 - 2² = 42556909 is a prime.

It is a super-2 number, since 2×42556913² = 3622181688179138, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (42556963) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1070 + ... + 9287.

It is an arithmetic number, because the mean of its divisors is an integer number (6090504).

Almost surely, 2^42556913 is an apocalyptic number.

It is an amenable number.

42556913 is a deficient number, since it is larger than the sum of its proper divisors (6167119).

42556913 is a wasteful number, since it uses less digits than its factorization.

42556913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10951.

The product of its digits is 32400, while the sum is 35.

The square root of 42556913 is about 6523.5659726870. The cubic root of 42556913 is about 349.1323078069.

The spelling of 42556913 in words is "forty-two million, five hundred fifty-six thousand, nine hundred thirteen".