31229493 has 16 divisors (see below), whose sum is σ = 45513216. Its totient is φ = 18961920.

The previous prime is 31229489. The next prime is 31229509. The reversal of 31229493 is 39492213.

It is not a de Polignac number, because 31229493 - 2² = 31229489 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31229893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8296 + ... + 11457.

It is an arithmetic number, because the mean of its divisors is an integer number (2844576).

Almost surely, 2^31229493 is an apocalyptic number.

It is an amenable number.

31229493 is a deficient number, since it is larger than the sum of its proper divisors (14283723).

31229493 is a wasteful number, since it uses less digits than its factorization.

31229493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19804.

The product of its digits is 11664, while the sum is 33.

The square root of 31229493 is about 5588.3354408983. The cubic root of 31229493 is about 314.9113481945.

The spelling of 31229493 in words is "thirty-one million, two hundred twenty-nine thousand, four hundred ninety-three".