2315407721 has 6 divisors (see below), whose sum is σ = 2545035066. Its totient is φ = 2104916000.

The previous prime is 2315407711. The next prime is 2315407747. The reversal of 2315407721 is 1277045132.

It can be written as a sum of positive squares in only one way, i.e., 2184534121 + 130873600 = 46739^2 + 11440^2 .

It is not a de Polignac number, because 2315407721 - 2¹⁰ = 2315406697 is a prime.

It is a super-2 number, since 2×2315407721² = 10722225828932827682, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2315407711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9567680 + ... + 9567921.

It is an arithmetic number, because the mean of its divisors is an integer number (424172511).

Almost surely, 2^2315407721 is an apocalyptic number.

It is an amenable number.

2315407721 is a deficient number, since it is larger than the sum of its proper divisors (229627345).

2315407721 is a wasteful number, since it uses less digits than its factorization.

2315407721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19135623 (or 19135612 counting only the distinct ones).

The product of its (nonzero) digits is 11760, while the sum is 32.

The square root of 2315407721 is about 48118.6836997855. The cubic root of 2315407721 is about 1322.9471419203.

The spelling of 2315407721 in words is "two billion, three hundred fifteen million, four hundred seven thousand, seven hundred twenty-one".