31442427 has 12 divisors (see below), whose sum is σ = 45723600. Its totient is φ = 20820048.

The previous prime is 31442419. The next prime is 31442431. The reversal of 31442427 is 72424413.

It is not a de Polignac number, because 31442427 - 2³ = 31442419 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31442427.

It is not an unprimeable number, because it can be changed into a prime (31442527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10383 + ... + 13064.

It is an arithmetic number, because the mean of its divisors is an integer number (3810300).

Almost surely, 2^31442427 is an apocalyptic number.

31442427 is a deficient number, since it is larger than the sum of its proper divisors (14281173).

31442427 is a wasteful number, since it uses less digits than its factorization.

31442427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23602 (or 23599 counting only the distinct ones).

The product of its digits is 5376, while the sum is 27.

The square root of 31442427 is about 5607.3547239318. The cubic root of 31442427 is about 315.6254541966.

The spelling of 31442427 in words is "thirty-one million, four hundred forty-two thousand, four hundred twenty-seven".