312131140 has 24 divisors (see below), whose sum is σ = 655807320. Its totient is φ = 124789248.

The previous prime is 312131119. The next prime is 312131143. The reversal of 312131140 is 41131213.

It can be written as a sum of positive squares in 4 ways, for example, as 106667584 + 205463556 = 10328^2 + 14334^2 .

It is not an unprimeable number, because it can be changed into a prime (312131143) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 75774 + ... + 79786.

It is an arithmetic number, because the mean of its divisors is an integer number (27325305).

Almost surely, 2^312131140 is an apocalyptic number.

It is an amenable number.

312131140 is an abundant number, since it is smaller than the sum of its proper divisors (343676180).

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

312131140 is a wasteful number, since it uses less digits than its factorization.

312131140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7911 (or 7909 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 312131140 is about 17667.2335129188. The cubic root of 312131140 is about 678.3373016743.

Adding to 312131140 its reverse (41131213), we get a palindrome (353262353).

The spelling of 312131140 in words is "three hundred twelve million, one hundred thirty-one thousand, one hundred forty".