312131087 has 2 divisors, whose sum is σ = 312131088. Its totient is φ = 312131086.

The previous prime is 312131047. The next prime is 312131119. The reversal of 312131087 is 780131213.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 312131087 - 2¹⁸ = 311868943 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (312131047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156065543 + 156065544.

It is an arithmetic number, because the mean of its divisors is an integer number (156065544).

Almost surely, 2^312131087 is an apocalyptic number.

312131087 is a deficient number, since it is larger than the sum of its proper divisors (1).

312131087 is an equidigital number, since it uses as much as digits as its factorization.

312131087 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1008, while the sum is 26.

The square root of 312131087 is about 17667.2320129668. The cubic root of 312131087 is about 678.3372632803.

The spelling of 312131087 in words is "three hundred twelve million, one hundred thirty-one thousand, eighty-seven".