31413320 has 16 divisors (see below), whose sum is σ = 70680060. Its totient is φ = 12565312.

The previous prime is 31413313. The next prime is 31413329. The reversal of 31413320 is 2331413.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 30980356 + 432964 = 5566^2 + 658^2 .

It is not an unprimeable number, because it can be changed into a prime (31413329) 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 3 ways as a sum of consecutive naturals, for example, 392627 + ... + 392706.

Almost surely, 2^31413320 is an apocalyptic number.

It is an amenable number.

31413320 is an abundant number, since it is smaller than the sum of its proper divisors (39266740).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31413320 is a wasteful number, since it uses less digits than its factorization.

31413320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 785344 (or 785340 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 31413320 is about 5604.7586923970. The cubic root of 31413320 is about 315.5280301396.

Adding to 31413320 its reverse (2331413), we get a palindrome (33744733).

The spelling of 31413320 in words is "thirty-one million, four hundred thirteen thousand, three hundred twenty".