42556023 has 20 divisors (see below), whose sum is σ = 63800880. Its totient is φ = 28268352.

The previous prime is 42556001. The next prime is 42556037. The reversal of 42556023 is 32065524.

42556023 is a `hidden beast` number, since 4 + 2 + 55 + 602 + 3 = 666.

It is not a de Polignac number, because 42556023 - 2⁶ = 42555959 is a prime.

It is a super-2 number, since 2×42556023² = 3622030187153058, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42556043) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 26518 + ... + 28076.

It is an arithmetic number, because the mean of its divisors is an integer number (3190044).

Almost surely, 2^42556023 is an apocalyptic number.

42556023 is a deficient number, since it is larger than the sum of its proper divisors (21244857).

42556023 is a wasteful number, since it uses less digits than its factorization.

42556023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1908 (or 1899 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 27.

The square root of 42556023 is about 6523.4977581049. The cubic root of 42556023 is about 349.1298739687.

The spelling of 42556023 in words is "forty-two million, five hundred fifty-six thousand, twenty-three".