31228479 has 12 divisors (see below), whose sum is σ = 45279000. Its totient is φ = 20739984.

The previous prime is 31228469. The next prime is 31228537. The reversal of 31228479 is 97482213.

It is not a de Polignac number, because 31228479 - 2⁹ = 31227967 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31228459) 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, 4029 + ... + 8870.

It is an arithmetic number, because the mean of its divisors is an integer number (3773250).

Almost surely, 2^31228479 is an apocalyptic number.

31228479 is a deficient number, since it is larger than the sum of its proper divisors (14050521).

31228479 is a wasteful number, since it uses less digits than its factorization.

31228479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13174 (or 13171 counting only the distinct ones).

The product of its digits is 24192, while the sum is 36.

The square root of 31228479 is about 5588.2447154719. The cubic root of 31228479 is about 314.9079398399.

The spelling of 31228479 in words is "thirty-one million, two hundred twenty-eight thousand, four hundred seventy-nine".