31345413 has 12 divisors (see below), whose sum is σ = 45939264. Its totient is φ = 18997000.

The previous prime is 31345403. The next prime is 31345417. The reversal of 31345413 is 31454313.

It is a happy number.

It is not a de Polignac number, because 31345413 - 2⁸ = 31345157 is a prime.

It is a super-2 number, since 2×31345413² = 1965069832281138, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31345417) 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 11 ways as a sum of consecutive naturals, for example, 42813 + ... + 43538.

It is an arithmetic number, because the mean of its divisors is an integer number (3828272).

Almost surely, 2^31345413 is an apocalyptic number.

31345413 is a gapful number since it is divisible by the number (33) formed by its first and last digit.

It is an amenable number.

31345413 is a deficient number, since it is larger than the sum of its proper divisors (14593851).

31345413 is a wasteful number, since it uses less digits than its factorization.

31345413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86376 (or 86365 counting only the distinct ones).

The product of its digits is 2160, while the sum is 24.

The square root of 31345413 is about 5598.6974377975. The cubic root of 31345413 is about 315.3005043643.

Adding to 31345413 its reverse (31454313), we get a palindrome (62799726).

Subtracting 31345413 from its reverse (31454313), we obtain a square (108900 = 330²).

The spelling of 31345413 in words is "thirty-one million, three hundred forty-five thousand, four hundred thirteen".