31712230 has 16 divisors (see below), whose sum is σ = 62271504. Its totient is φ = 11531680.

The previous prime is 31712203. The next prime is 31712231. The reversal of 31712230 is 3221713.

It is a junction number, because it is equal to n+sod(n) for n = 31712198 and 31712207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31712231) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 144037 + ... + 144256.

It is an arithmetic number, because the mean of its divisors is an integer number (3891969).

Almost surely, 2^31712230 is an apocalyptic number.

31712230 is a deficient number, since it is larger than the sum of its proper divisors (30559274).

31712230 is a wasteful number, since it uses less digits than its factorization.

31712230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 288311.

The product of its (nonzero) digits is 252, while the sum is 19.

The square root of 31712230 is about 5631.3612919080. The cubic root of 31712230 is about 316.5256632938.

Adding to 31712230 its reverse (3221713), we get a palindrome (34933943).

The spelling of 31712230 in words is "thirty-one million, seven hundred twelve thousand, two hundred thirty".