31332040 has 32 divisors (see below), whose sum is σ = 71658360. Its totient is φ = 12326400.

The previous prime is 31332031. The next prime is 31332053. The reversal of 31332040 is 4023313.

It can be written as a sum of positive squares in 4 ways, for example, as 15792676 + 15539364 = 3974^2 + 3942^2 .

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 3981 + ... + 8860.

Almost surely, 2^31332040 is an apocalyptic number.

It is an amenable number.

31332040 is an abundant number, since it is smaller than the sum of its proper divisors (40326320).

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

31332040 is a wasteful number, since it uses less digits than its factorization.

31332040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12913 (or 12909 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 16.

The square root of 31332040 is about 5597.5030147379. The cubic root of 31332040 is about 315.2556587445.

Adding to 31332040 its reverse (4023313), we get a palindrome (35355353).

The spelling of 31332040 in words is "thirty-one million, three hundred thirty-two thousand, forty".