312312157 has 2 divisors, whose sum is σ = 312312158. Its totient is φ = 312312156.

The previous prime is 312312103. The next prime is 312312163. The reversal of 312312157 is 751213213.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 268500996 + 43811161 = 16386^2 + 6619^2 .

It is a cyclic number.

It is not a de Polignac number, because 312312157 - 2⁷ = 312312029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (312312167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156156078 + 156156079.

It is an arithmetic number, because the mean of its divisors is an integer number (156156079).

Almost surely, 2^312312157 is an apocalyptic number.

It is an amenable number.

312312157 is a deficient number, since it is larger than the sum of its proper divisors (1).

312312157 is an equidigital number, since it uses as much as digits as its factorization.

312312157 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1260, while the sum is 25.

The square root of 312312157 is about 17672.3557286515. The cubic root of 312312157 is about 678.4684077365.

The spelling of 312312157 in words is "three hundred twelve million, three hundred twelve thousand, one hundred fifty-seven".