31330413 has 6 divisors (see below), whose sum is σ = 45255054. Its totient is φ = 20886936.

The previous prime is 31330391. The next prime is 31330417. The reversal of 31330413 is 31403313.

It can be written as a sum of positive squares in only one way, i.e., 30669444 + 660969 = 5538^2 + 813^2 .

It is not a de Polignac number, because 31330413 - 2⁹ = 31329901 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31330417) 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 5 ways as a sum of consecutive naturals, for example, 1740570 + ... + 1740587.

It is an arithmetic number, because the mean of its divisors is an integer number (7542509).

Almost surely, 2^31330413 is an apocalyptic number.

It is an amenable number.

31330413 is a deficient number, since it is larger than the sum of its proper divisors (13924641).

31330413 is a wasteful number, since it uses less digits than its factorization.

31330413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3481163 (or 3481160 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 18.

The square root of 31330413 is about 5597.3576801916. The cubic root of 31330413 is about 315.2502018189.

Adding to 31330413 its reverse (31403313), we get a palindrome (62733726).

Subtracting 31330413 from its reverse (31403313), we obtain a square (72900 = 270²).

The spelling of 31330413 in words is "thirty-one million, three hundred thirty thousand, four hundred thirteen".