42299031 has 12 divisors (see below), whose sum is σ = 57224696. Its totient is φ = 27792240.

The previous prime is 42299027. The next prime is 42299039. The reversal of 42299031 is 13099224.

It is not a de Polignac number, because 42299031 - 2² = 42299027 is a prime.

It is a super-2 number, since 2×42299031² = 3578416047077922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42299031.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42299039) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13725 + ... + 16521.

Almost surely, 2^42299031 is an apocalyptic number.

42299031 is a deficient number, since it is larger than the sum of its proper divisors (14925665).

42299031 is an equidigital number, since it uses as much as digits as its factorization.

42299031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2942 (or 2871 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 30.

The square root of 42299031 is about 6503.7705217820. The cubic root of 42299031 is about 348.4256665302.

The spelling of 42299031 in words is "forty-two million, two hundred ninety-nine thousand, thirty-one".