42502331 has 4 divisors (see below), whose sum is σ = 42563664. Its totient is φ = 42441000.

The previous prime is 42502319. The next prime is 42502337. The reversal of 42502331 is 13320524.

It is a happy number.

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 42502331 - 2²² = 38308027 is a prime.

It is a super-2 number, since 2×42502331² = 3612896280867122, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (42502337) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29615 + ... + 31016.

It is an arithmetic number, because the mean of its divisors is an integer number (10640916).

Almost surely, 2^42502331 is an apocalyptic number.

42502331 is a deficient number, since it is larger than the sum of its proper divisors (61333).

42502331 is an equidigital number, since it uses as much as digits as its factorization.

42502331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61332.

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 42502331 is about 6519.3811822902. The cubic root of 42502331 is about 348.9829823422.

Adding to 42502331 its reverse (13320524), we get a palindrome (55822855).

The spelling of 42502331 in words is "forty-two million, five hundred two thousand, three hundred thirty-one".