311231002231949 has 2 divisors, whose sum is σ = 311231002231950. Its totient is φ = 311231002231948.

The previous prime is 311231002231921. The next prime is 311231002232011. The reversal of 311231002231949 is 949132200132113.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 249626791374724 + 61604210857225 = 15799582^2 + 7848835^2 .

It is a cyclic number.

It is not a de Polignac number, because 311231002231949 - 2³⁶ = 311162282755213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (311231002231249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155615501115974 + 155615501115975.

It is an arithmetic number, because the mean of its divisors is an integer number (155615501115975).

Almost surely, 2^{311231002231949} is an apocalyptic number.

It is an amenable number.

311231002231949 is a deficient number, since it is larger than the sum of its proper divisors (1).

311231002231949 is an equidigital number, since it uses as much as digits as its factorization.

311231002231949 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 69984, while the sum is 41.

The spelling of 311231002231949 in words is "three hundred eleven trillion, two hundred thirty-one billion, two million, two hundred thirty-one thousand, nine hundred forty-nine".