31230997 has 12 divisors (see below), whose sum is σ = 36694560. Its totient is φ = 26037936.

The previous prime is 31230977. The next prime is 31231009. The reversal of 31230997 is 79903213.

It is a de Polignac number, because none of the positive numbers 2^k-31230997 is a prime.

It is a super-2 number, since 2×31230997² = 1950750347228018, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31230967) 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, 7954 + ... + 11212.

It is an arithmetic number, because the mean of its divisors is an integer number (3057880).

Almost surely, 2^31230997 is an apocalyptic number.

31230997 is a gapful number since it is divisible by the number (37) formed by its first and last digit.

It is an amenable number.

31230997 is a deficient number, since it is larger than the sum of its proper divisors (5463563).

31230997 is an equidigital number, since it uses as much as digits as its factorization.

31230997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3340 (or 3303 counting only the distinct ones).

The product of its (nonzero) digits is 10206, while the sum is 34.

The square root of 31230997 is about 5588.4700052877. The cubic root of 31230997 is about 314.9164034486.

The spelling of 31230997 in words is "thirty-one million, two hundred thirty thousand, nine hundred ninety-seven".