316240805 has 4 divisors (see below), whose sum is σ = 379488972. Its totient is φ = 252992640.

The previous prime is 316240789. The next prime is 316240811. The reversal of 316240805 is 508042613.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 508042613 = 13 ⋅39080201.

It can be written as a sum of positive squares in 2 ways, for example, as 156900676 + 159340129 = 12526^2 + 12623^2 .

It is not a de Polignac number, because 316240805 - 2⁴ = 316240789 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31624076 + ... + 31624085.

It is an arithmetic number, because the mean of its divisors is an integer number (94872243).

Almost surely, 2^316240805 is an apocalyptic number.

It is an amenable number.

316240805 is a deficient number, since it is larger than the sum of its proper divisors (63248167).

316240805 is an equidigital number, since it uses as much as digits as its factorization.

316240805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63248166.

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 316240805 is about 17783.1607145637. The cubic root of 316240805 is about 681.3014328085.

The spelling of 316240805 in words is "three hundred sixteen million, two hundred forty thousand, eight hundred five".