312131330 has 32 divisors (see below), whose sum is σ = 643593600. Its totient is φ = 106767360.

The previous prime is 312131317. The next prime is 312131333. The reversal of 312131330 is 33131213.

It is a junction number, because it is equal to n+sod(n) for n = 312131299 and 312131308.

It is not an unprimeable number, because it can be changed into a prime (312131333) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26465 + ... + 36395.

It is an arithmetic number, because the mean of its divisors is an integer number (20112300).

Almost surely, 2^312131330 is an apocalyptic number.

312131330 is an abundant number, since it is smaller than the sum of its proper divisors (331462270).

312131330 is a wasteful number, since it uses less digits than its factorization.

312131330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10394.

The product of its (nonzero) digits is 162, while the sum is 17.

The square root of 312131330 is about 17667.2388901039. The cubic root of 312131330 is about 678.3374393131.

Adding to 312131330 its reverse (33131213), we get a palindrome (345262543).

The spelling of 312131330 in words is "three hundred twelve million, one hundred thirty-one thousand, three hundred thirty".