31330130 has 32 divisors (see below), whose sum is σ = 60985008. Its totient is φ = 11520000.

The previous prime is 31330129. The next prime is 31330141. The reversal of 31330130 is 3103313.

It can be written as a sum of positive squares in 8 ways, for example, as 23551609 + 7778521 = 4853^2 + 2789^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51830 + ... + 52430.

Almost surely, 2^31330130 is an apocalyptic number.

31330130 is a deficient number, since it is larger than the sum of its proper divisors (29654878).

31330130 is a wasteful number, since it uses less digits than its factorization.

31330130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1022.

The product of its (nonzero) digits is 81, while the sum is 14.

The square root of 31330130 is about 5597.3324003493. The cubic root of 31330130 is about 315.2492526232.

Adding to 31330130 its reverse (3103313), we get a palindrome (34433443).

The spelling of 31330130 in words is "thirty-one million, three hundred thirty thousand, one hundred thirty".