31253152 has 72 divisors (see below), whose sum is σ = 72944928. Its totient is φ = 12910080.

The previous prime is 31253143. The next prime is 31253153. The reversal of 31253152 is 25135213.

It is not an unprimeable number, because it can be changed into a prime (31253153) 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, 376503 + ... + 376585.

It is an arithmetic number, because the mean of its divisors is an integer number (1013124).

Almost surely, 2^31253152 is an apocalyptic number.

31253152 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31253152, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36472464).

31253152 is an abundant number, since it is smaller than the sum of its proper divisors (41691776).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31253152 is an equidigital number, since it uses as much as digits as its factorization.

31253152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182 (or 133 counting only the distinct ones).

The product of its digits is 900, while the sum is 22.

The square root of 31253152 is about 5590.4518600915. The cubic root of 31253152 is about 314.9908521741.

Adding to 31253152 its reverse (25135213), we get a palindrome (56388365).

The spelling of 31253152 in words is "thirty-one million, two hundred fifty-three thousand, one hundred fifty-two".