42500531 has 4 divisors (see below), whose sum is σ = 43649232. Its totient is φ = 41351832.

The previous prime is 42500519. The next prime is 42500539. The reversal of 42500531 is 13500524.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 42500531 - 2¹⁴ = 42484147 is a prime.

It is a super-2 number, since 2×42500531² = 3612590270563922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42500539) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 574295 + ... + 574368.

It is an arithmetic number, because the mean of its divisors is an integer number (10912308).

Almost surely, 2^42500531 is an apocalyptic number.

42500531 is a deficient number, since it is larger than the sum of its proper divisors (1148701).

42500531 is a wasteful number, since it uses less digits than its factorization.

42500531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1148700.

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 42500531 is about 6519.2431309163. The cubic root of 42500531 is about 348.9780557243.

The spelling of 42500531 in words is "forty-two million, five hundred thousand, five hundred thirty-one".