1317478051 has 4 divisors (see below), whose sum is σ = 1349611704. Its totient is φ = 1285344400.

The previous prime is 1317478039. The next prime is 1317478067. The reversal of 1317478051 is 1508747131.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1317478051 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 1317478051.

It is not an unprimeable number, because it can be changed into a prime (1317478651) 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, 16066765 + ... + 16066846.

It is an arithmetic number, because the mean of its divisors is an integer number (337402926).

Almost surely, 2^1317478051 is an apocalyptic number.

1317478051 is a deficient number, since it is larger than the sum of its proper divisors (32133653).

1317478051 is an equidigital number, since it uses as much as digits as its factorization.

1317478051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32133652.

The product of its (nonzero) digits is 23520, while the sum is 37.

The square root of 1317478051 is about 36297.0804748812. The cubic root of 1317478051 is about 1096.2622589205.

The spelling of 1317478051 in words is "one billion, three hundred seventeen million, four hundred seventy-eight thousand, fifty-one".