42502631 has 4 divisors (see below), whose sum is σ = 42516552. Its totient is φ = 42488712.

The previous prime is 42502627. The next prime is 42502667. The reversal of 42502631 is 13620524.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 42502631 - 2² = 42502627 is a prime.

It is a super-2 number, since 2×42502631² = 3612947283844322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42502597 and 42502606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42502931) 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, 176 + ... + 9221.

It is an arithmetic number, because the mean of its divisors is an integer number (10629138).

Almost surely, 2^42502631 is an apocalyptic number.

42502631 is a deficient number, since it is larger than the sum of its proper divisors (13921).

42502631 is an equidigital number, since it uses as much as digits as its factorization.

42502631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13920.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 42502631 is about 6519.4041905683. The cubic root of 42502631 is about 348.9838034317.

The spelling of 42502631 in words is "forty-two million, five hundred two thousand, six hundred thirty-one".