1313531651 has 2 divisors, whose sum is σ = 1313531652. Its totient is φ = 1313531650.

The previous prime is 1313531647. The next prime is 1313531677. The reversal of 1313531651 is 1561353131.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1313531651 - 2² = 1313531647 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (1313531951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 656765825 + 656765826.

It is an arithmetic number, because the mean of its divisors is an integer number (656765826).

Almost surely, 2^1313531651 is an apocalyptic number.

1313531651 is a deficient number, since it is larger than the sum of its proper divisors (1).

1313531651 is an equidigital number, since it uses as much as digits as its factorization.

1313531651 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4050, while the sum is 29.

The square root of 1313531651 is about 36242.6772051955. The cubic root of 1313531651 is about 1095.1665755774.

Adding to 1313531651 its reverse (1561353131), we get a palindrome (2874884782).

The spelling of 1313531651 in words is "one billion, three hundred thirteen million, five hundred thirty-one thousand, six hundred fifty-one".