31243252 has 12 divisors (see below), whose sum is σ = 54808516. Its totient is φ = 15583680.

The previous prime is 31243249. The next prime is 31243253. The reversal of 31243252 is 25234213.

It can be written as a sum of positive squares in 2 ways, for example, as 839056 + 30404196 = 916^2 + 5514^2 .

It is a super-2 number, since 2×31243252² = 1952281591071008, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31243253) 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 3 ways as a sum of consecutive naturals, for example, 7593 + ... + 10960.

Almost surely, 2^31243252 is an apocalyptic number.

It is an amenable number.

31243252 is a deficient number, since it is larger than the sum of its proper divisors (23565264).

31243252 is a wasteful number, since it uses less digits than its factorization.

31243252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18978 (or 18976 counting only the distinct ones).

The product of its digits is 1440, while the sum is 22.

The square root of 31243252 is about 5589.5663516949. The cubic root of 31243252 is about 314.9575889823.

Adding to 31243252 its reverse (25234213), we get a palindrome (56477465).

The spelling of 31243252 in words is "thirty-one million, two hundred forty-three thousand, two hundred fifty-two".