31031253 has 24 divisors (see below), whose sum is σ = 49105056. Its totient is φ = 18727200.

The previous prime is 31031201. The next prime is 31031257. The reversal of 31031253 is 35213013.

It is not a de Polignac number, because 31031253 - 2¹³ = 31023061 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31031257) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 29883 + ... + 30903.

It is an arithmetic number, because the mean of its divisors is an integer number (2046044).

Almost surely, 2^31031253 is an apocalyptic number.

31031253 is a gapful number since it is divisible by the number (33) formed by its first and last digit.

It is an amenable number.

31031253 is a deficient number, since it is larger than the sum of its proper divisors (18073803).

31031253 is a wasteful number, since it uses less digits than its factorization.

31031253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1345 (or 1342 counting only the distinct ones).

The product of its (nonzero) digits is 270, while the sum is 18.

The square root of 31031253 is about 5570.5702580616. The cubic root of 31031253 is about 314.2435970618.

Adding to 31031253 its reverse (35213013), we get a palindrome (66244266).

It can be divided in two parts, 3103 and 1253, that added together give a square (4356 = 66²).

The spelling of 31031253 in words is "thirty-one million, thirty-one thousand, two hundred fifty-three".