2315774721 has 24 divisors (see below), whose sum is σ = 3400198560. Its totient is φ = 1400919936.

The previous prime is 2315774719. The next prime is 2315774723. The reversal of 2315774721 is 1274775132.

It is an interprime number because it is at equal distance from previous prime (2315774719) and next prime (2315774723).

It is not a de Polignac number, because 2315774721 - 2¹ = 2315774719 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a self number, because there is not a number n which added to its sum of digits gives 2315774721.

It is not an unprimeable number, because it can be changed into a prime (2315774723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8796 + ... + 68621.

It is an arithmetic number, because the mean of its divisors is an integer number (141674940).

Almost surely, 2^2315774721 is an apocalyptic number.

It is an amenable number.

2315774721 is a deficient number, since it is larger than the sum of its proper divisors (1084423839).

2315774721 is a wasteful number, since it uses less digits than its factorization.

2315774721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77505 (or 77492 counting only the distinct ones).

The product of its digits is 82320, while the sum is 39.

The square root of 2315774721 is about 48122.4970362096. The cubic root of 2315774721 is about 1323.0170354351.

The spelling of 2315774721 in words is "two billion, three hundred fifteen million, seven hundred seventy-four thousand, seven hundred twenty-one".