31424761 has 4 divisors (see below), whose sum is σ = 31633024. Its totient is φ = 31216500.

The previous prime is 31424759. The next prime is 31424779. The reversal of 31424761 is 16742413.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 31424761 - 2¹ = 31424759 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31424711) 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, 103905 + ... + 104206.

It is an arithmetic number, because the mean of its divisors is an integer number (7908256).

Almost surely, 2^31424761 is an apocalyptic number.

It is an amenable number.

31424761 is a deficient number, since it is larger than the sum of its proper divisors (208263).

31424761 is a wasteful number, since it uses less digits than its factorization.

31424761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208262.

The product of its digits is 4032, while the sum is 28.

The square root of 31424761 is about 5605.7792500240. The cubic root of 31424761 is about 315.5663314932.

The spelling of 31424761 in words is "thirty-one million, four hundred twenty-four thousand, seven hundred sixty-one".