31013025 has 24 divisors (see below), whose sum is σ = 51455040. Its totient is φ = 16482240.

The previous prime is 31013023. The next prime is 31013041. The reversal of 31013025 is 52031013.

It is a happy number.

It is not a de Polignac number, because 31013025 - 2¹ = 31013023 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a junction number, because it is equal to n+sod(n) for n = 31012995 and 31013013.

It is not an unprimeable number, because it can be changed into a prime (31013023) 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, 28644 + ... + 29706.

It is an arithmetic number, because the mean of its divisors is an integer number (2143960).

Almost surely, 2^31013025 is an apocalyptic number.

It is an amenable number.

31013025 is a deficient number, since it is larger than the sum of its proper divisors (20442015).

31013025 is a wasteful number, since it uses less digits than its factorization.

31013025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1465 (or 1460 counting only the distinct ones).

The product of its (nonzero) digits is 90, while the sum is 15.

The square root of 31013025 is about 5568.9339195218. The cubic root of 31013025 is about 314.1820552970.

Adding to 31013025 its reverse (52031013), we get a palindrome (83044038).

The spelling of 31013025 in words is "thirty-one million, thirteen thousand, twenty-five".