311223003257 has 2 divisors, whose sum is σ = 311223003258. Its totient is φ = 311223003256.

The previous prime is 311223003163. The next prime is 311223003317. The reversal of 311223003257 is 752300322113.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 278763936361 + 32459066896 = 527981^2 + 180164^2 .

It is a cyclic number.

It is not a de Polignac number, because 311223003257 - 2⁸ = 311223003001 is a prime.

It is not a weakly prime, because it can be changed into another prime (311223003557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155611501628 + 155611501629.

It is an arithmetic number, because the mean of its divisors is an integer number (155611501629).

Almost surely, 2^311223003257 is an apocalyptic number.

It is an amenable number.

311223003257 is a deficient number, since it is larger than the sum of its proper divisors (1).

311223003257 is an equidigital number, since it uses as much as digits as its factorization.

311223003257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7560, while the sum is 29.

The spelling of 311223003257 in words is "three hundred eleven billion, two hundred twenty-three million, three thousand, two hundred fifty-seven".