1316520851 has 32 divisors (see below), whose sum is σ = 1489259520. Its totient is φ = 1157330944.

The previous prime is 1316520797. The next prime is 1316520869. The reversal of 1316520851 is 1580256131.

It is a cyclic number.

It is not a de Polignac number, because 1316520851 - 2³⁰ = 242779027 is a prime.

It is a super-2 number, since 2×1316520851² = 3466454302235528402, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1316520251) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3667010 + ... + 3667368.

It is an arithmetic number, because the mean of its divisors is an integer number (46539360).

Almost surely, 2^1316520851 is an apocalyptic number.

1316520851 is a deficient number, since it is larger than the sum of its proper divisors (172738669).

1316520851 is a wasteful number, since it uses less digits than its factorization.

1316520851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 595.

The product of its (nonzero) digits is 7200, while the sum is 32.

The square root of 1316520851 is about 36283.8924455467. The cubic root of 1316520851 is about 1095.9967019432.

Adding to 1316520851 its reverse (1580256131), we get a palindrome (2896776982).

The spelling of 1316520851 in words is "one billion, three hundred sixteen million, five hundred twenty thousand, eight hundred fifty-one".