31422642 has 16 divisors (see below), whose sum is σ = 63011520. Its totient is φ = 10446512.

The previous prime is 31422641. The next prime is 31422659. The reversal of 31422642 is 24622413.

It is not an unprimeable number, because it can be changed into a prime (31422641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4398 + ... + 9065.

It is an arithmetic number, because the mean of its divisors is an integer number (3938220).

Almost surely, 2^31422642 is an apocalyptic number.

31422642 is an abundant number, since it is smaller than the sum of its proper divisors (31588878).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31422642 is a wasteful number, since it uses less digits than its factorization.

31422642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13857.

The product of its digits is 2304, while the sum is 24.

The square root of 31422642 is about 5605.5902454603. The cubic root of 31422642 is about 315.5592383595.

The spelling of 31422642 in words is "thirty-one million, four hundred twenty-two thousand, six hundred forty-two".