31713253 has 12 divisors (see below), whose sum is σ = 37541644. Its totient is φ = 26611200.

The previous prime is 31713179. The next prime is 31713259. The reversal of 31713253 is 35231713.

It can be written as a sum of positive squares in 2 ways, for example, as 12159169 + 19554084 = 3487^2 + 4422^2 .

It is not a de Polignac number, because 31713253 - 2²¹ = 29616101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31713259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8508 + ... + 11653.

Almost surely, 2^31713253 is an apocalyptic number.

It is an amenable number.

31713253 is a deficient number, since it is larger than the sum of its proper divisors (5828391).

31713253 is a wasteful number, since it uses less digits than its factorization.

31713253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20196 (or 20185 counting only the distinct ones).

The product of its digits is 1890, while the sum is 25.

The square root of 31713253 is about 5631.4521217888. The cubic root of 31713253 is about 316.5290668416.

Adding to 31713253 its reverse (35231713), we get a palindrome (66944966).

The spelling of 31713253 in words is "thirty-one million, seven hundred thirteen thousand, two hundred fifty-three".