1316323651 has 4 divisors (see below), whose sum is σ = 1393754472. Its totient is φ = 1238892832.

The previous prime is 1316323633. The next prime is 1316323661. The reversal of 1316323651 is 1563236131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1563236131 = 173 ⋅9036047.

It is a cyclic number.

It is not a de Polignac number, because 1316323651 - 2²⁵ = 1282769219 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1316323621) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38715385 + ... + 38715418.

It is an arithmetic number, because the mean of its divisors is an integer number (348438618).

Almost surely, 2^1316323651 is an apocalyptic number.

1316323651 is a deficient number, since it is larger than the sum of its proper divisors (77430821).

1316323651 is an equidigital number, since it uses as much as digits as its factorization.

1316323651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77430820.

The product of its digits is 9720, while the sum is 31.

The square root of 1316323651 is about 36281.1748845045. The cubic root of 1316323651 is about 1095.9419765555.

Adding to 1316323651 its reverse (1563236131), we get a palindrome (2879559782).

The spelling of 1316323651 in words is "one billion, three hundred sixteen million, three hundred twenty-three thousand, six hundred fifty-one".