31252013 has 16 divisors (see below), whose sum is σ = 35392896. Its totient is φ = 27397440.

The previous prime is 31252007. The next prime is 31252043. The reversal of 31252013 is 31025213.

It is a cyclic number.

It is not a de Polignac number, because 31252013 - 2¹⁴ = 31235629 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31251982 and 31252000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31252043) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19928 + ... + 21438.

It is an arithmetic number, because the mean of its divisors is an integer number (2212056).

Almost surely, 2^31252013 is an apocalyptic number.

It is an amenable number.

31252013 is a deficient number, since it is larger than the sum of its proper divisors (4140883).

31252013 is a wasteful number, since it uses less digits than its factorization.

31252013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1604.

The product of its (nonzero) digits is 180, while the sum is 17.

The square root of 31252013 is about 5590.3499890436. The cubic root of 31252013 is about 314.9870255847.

Adding to 31252013 its reverse (31025213), we get a palindrome (62277226).

It can be divided in two parts, 312 and 52013, that added together give a palindrome (52325).

The spelling of 31252013 in words is "thirty-one million, two hundred fifty-two thousand, thirteen".