311040157 has 2 divisors, whose sum is σ = 311040158. Its totient is φ = 311040156.

The previous prime is 311040091. The next prime is 311040179. The reversal of 311040157 is 751040113.

It is an a-pointer prime, because the next prime (311040179) can be obtained adding 311040157 to its sum of digits (22).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 222039801 + 89000356 = 14901^2 + 9434^2 .

It is a cyclic number.

It is not a de Polignac number, because 311040157 - 2⁷ = 311040029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (311040187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155520078 + 155520079.

It is an arithmetic number, because the mean of its divisors is an integer number (155520079).

Almost surely, 2^311040157 is an apocalyptic number.

It is an amenable number.

311040157 is a deficient number, since it is larger than the sum of its proper divisors (1).

311040157 is an equidigital number, since it uses as much as digits as its factorization.

311040157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 420, while the sum is 22.

The square root of 311040157 is about 17636.3305990787. The cubic root of 311040157 is about 677.5460547933.

The spelling of 311040157 in words is "three hundred eleven million, forty thousand, one hundred fifty-seven".