1314257731 has 2 divisors, whose sum is σ = 1314257732. Its totient is φ = 1314257730.

The previous prime is 1314257689. The next prime is 1314257827. The reversal of 1314257731 is 1377524131.

It is a weak prime.

It is an emirp because it is prime and its reverse (1377524131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1314257731 - 2⁷ = 1314257603 is a prime.

It is a super-2 number, since 2×1314257731² = 3454546766986536722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1314257831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 657128865 + 657128866.

It is an arithmetic number, because the mean of its divisors is an integer number (657128866).

Almost surely, 2^1314257731 is an apocalyptic number.

1314257731 is a deficient number, since it is larger than the sum of its proper divisors (1).

1314257731 is an equidigital number, since it uses as much as digits as its factorization.

1314257731 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17640, while the sum is 34.

The square root of 1314257731 is about 36252.6927413675. The cubic root of 1314257731 is about 1095.3683299025.

The spelling of 1314257731 in words is "one billion, three hundred fourteen million, two hundred fifty-seven thousand, seven hundred thirty-one".