31012641 has 24 divisors (see below), whose sum is σ = 51745824. Its totient is φ = 17688960.

The previous prime is 31012633. The next prime is 31012649. The reversal of 31012641 is 14621013.

It is a happy number.

31012641 is a `hidden beast` number, since 3 + 10 + 12 + 641 = 666.

It is an interprime number because it is at equal distance from previous prime (31012633) and next prime (31012649).

It is not a de Polignac number, because 31012641 - 2³ = 31012633 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31012649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7531 + ... + 10896.

It is an arithmetic number, because the mean of its divisors is an integer number (2156076).

Almost surely, 2^31012641 is an apocalyptic number.

It is an amenable number.

31012641 is a deficient number, since it is larger than the sum of its proper divisors (20733183).

31012641 is a wasteful number, since it uses less digits than its factorization.

31012641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18461 (or 18458 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 31012641 is about 5568.8994424392. The cubic root of 31012641 is about 314.1807585687.

Adding to 31012641 its reverse (14621013), we get a palindrome (45633654).

The spelling of 31012641 in words is "thirty-one million, twelve thousand, six hundred forty-one".