1316508251 has 4 divisors (see below), whose sum is σ = 1323191232. Its totient is φ = 1309825272.

The previous prime is 1316508239. The next prime is 1316508299. The reversal of 1316508251 is 1528056131.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1316508251 - 2⁶ = 1316508187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1316508451) 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, 3341195 + ... + 3341588.

It is an arithmetic number, because the mean of its divisors is an integer number (330797808).

Almost surely, 2^1316508251 is an apocalyptic number.

1316508251 is a deficient number, since it is larger than the sum of its proper divisors (6682981).

1316508251 is an equidigital number, since it uses as much as digits as its factorization.

1316508251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6682980.

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

The square root of 1316508251 is about 36283.7188143663. The cubic root of 1316508251 is about 1095.9932054541.

The spelling of 1316508251 in words is "one billion, three hundred sixteen million, five hundred eight thousand, two hundred fifty-one".