810722313 has 12 divisors (see below), whose sum is σ = 1175905588. Its totient is φ = 538237440.

The previous prime is 810722309. The next prime is 810722321. The reversal of 810722313 is 313227018.

It can be written as a sum of positive squares in 2 ways, for example, as 446561424 + 364160889 = 21132^2 + 19083^2 .

It is not a de Polignac number, because 810722313 - 2² = 810722309 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (810722303) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 184720 + ... + 189057.

Almost surely, 2^810722313 is an apocalyptic number.

It is an amenable number.

810722313 is a deficient number, since it is larger than the sum of its proper divisors (365183275).

810722313 is a wasteful number, since it uses less digits than its factorization.

810722313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 374024 (or 374021 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 810722313 is about 28473.1858596821. The cubic root of 810722313 is about 932.4467551962.

The spelling of 810722313 in words is "eight hundred ten million, seven hundred twenty-two thousand, three hundred thirteen".