311325561645251 has 2 divisors, whose sum is σ = 311325561645252. Its totient is φ = 311325561645250.

The previous prime is 311325561645247. The next prime is 311325561645347. The reversal of 311325561645251 is 152546165523113.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 311325561645251 - 2² = 311325561645247 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 311325561645251.

It is not a weakly prime, because it can be changed into another prime (311325561645221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155662780822625 + 155662780822626.

It is an arithmetic number, because the mean of its divisors is an integer number (155662780822626).

Almost surely, 2^{311325561645251} is an apocalyptic number.

311325561645251 is a deficient number, since it is larger than the sum of its proper divisors (1).

311325561645251 is an equidigital number, since it uses as much as digits as its factorization.

311325561645251 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3240000, while the sum is 50.

The spelling of 311325561645251 in words is "three hundred eleven trillion, three hundred twenty-five billion, five hundred sixty-one million, six hundred forty-five thousand, two hundred fifty-one".