1316382257 has 4 divisors (see below), whose sum is σ = 1337962356. Its totient is φ = 1294802160.

The previous prime is 1316382211. The next prime is 1316382269. The reversal of 1316382257 is 7522836131.

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

It can be written as a sum of positive squares in 2 ways, for example, as 67749361 + 1248632896 = 8231^2 + 35336^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1316382257 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1316382257.

It is not an unprimeable number, because it can be changed into a prime (1316382857) 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, 10789958 + ... + 10790079.

It is an arithmetic number, because the mean of its divisors is an integer number (334490589).

Almost surely, 2^1316382257 is an apocalyptic number.

It is an amenable number.

1316382257 is a deficient number, since it is larger than the sum of its proper divisors (21580099).

1316382257 is an equidigital number, since it uses as much as digits as its factorization.

1316382257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21580098.

The product of its digits is 60480, while the sum is 38.

The square root of 1316382257 is about 36281.9825395471. The cubic root of 1316382257 is about 1095.9582410009.

The spelling of 1316382257 in words is "one billion, three hundred sixteen million, three hundred eighty-two thousand, two hundred fifty-seven".