314315721 has 10 divisors (see below), whose sum is σ = 469533482. Its totient is φ = 209543760.

The previous prime is 314315719. The next prime is 314315773. The reversal of 314315721 is 127513413.

It can be written as a sum of positive squares in only one way, i.e., 284765625 + 29550096 = 16875^2 + 5436^2 .

It is not a de Polignac number, because 314315721 - 2¹ = 314315719 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (314315321) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1940140 + ... + 1940301.

Almost surely, 2^314315721 is an apocalyptic number.

It is an amenable number.

314315721 is a deficient number, since it is larger than the sum of its proper divisors (155217761).

314315721 is an equidigital number, since it uses as much as digits as its factorization.

314315721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3880453 (or 3880444 counting only the distinct ones).

The product of its digits is 2520, while the sum is 27.

The square root of 314315721 is about 17728.9514918396. The cubic root of 314315721 is about 679.9161668566.

The spelling of 314315721 in words is "three hundred fourteen million, three hundred fifteen thousand, seven hundred twenty-one".