312131090 has 8 divisors (see below), whose sum is σ = 561835980. Its totient is φ = 124852432.

The previous prime is 312131087. The next prime is 312131119. The reversal of 312131090 is 90131213.

It can be written as a sum of positive squares in 2 ways, for example, as 311628409 + 502681 = 17653^2 + 709^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15606545 + ... + 15606564.

Almost surely, 2^312131090 is an apocalyptic number.

312131090 is a deficient number, since it is larger than the sum of its proper divisors (249704890).

312131090 is a wasteful number, since it uses less digits than its factorization.

312131090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31213116.

The product of its (nonzero) digits is 162, while the sum is 20.

The square root of 312131090 is about 17667.2320978698. The cubic root of 312131090 is about 678.3372654535.

The spelling of 312131090 in words is "three hundred twelve million, one hundred thirty-one thousand, ninety".