1315402531 has 2 divisors, whose sum is σ = 1315402532. Its totient is φ = 1315402530.

The previous prime is 1315402481. The next prime is 1315402541. The reversal of 1315402531 is 1352045131.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (1352045131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1315402531 - 2²⁹ = 778531619 is a prime.

It is a super-2 number, since 2×1315402531² = 3460567637122411922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1315402496 and 1315402505.

It is not a weakly prime, because it can be changed into another prime (1315402541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 657701265 + 657701266.

It is an arithmetic number, because the mean of its divisors is an integer number (657701266).

Almost surely, 2^1315402531 is an apocalyptic number.

1315402531 is a deficient number, since it is larger than the sum of its proper divisors (1).

1315402531 is an equidigital number, since it uses as much as digits as its factorization.

1315402531 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 1315402531 is about 36268.4784764953. The cubic root of 1315402531 is about 1095.6862821867.

Adding to 1315402531 its reverse (1352045131), we get a palindrome (2667447662).

The spelling of 1315402531 in words is "one billion, three hundred fifteen million, four hundred two thousand, five hundred thirty-one".