2315821651 has 64 divisors (see below), whose sum is σ = 3017710080. Its totient is φ = 1743759360.

The previous prime is 2315821649. The next prime is 2315821687. The reversal of 2315821651 is 1561285132.

It is not a de Polignac number, because 2315821651 - 2¹ = 2315821649 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2315821691) 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 63 ways as a sum of consecutive naturals, for example, 7543240 + ... + 7543546.

It is an arithmetic number, because the mean of its divisors is an integer number (47151720).

Almost surely, 2^2315821651 is an apocalyptic number.

2315821651 is a deficient number, since it is larger than the sum of its proper divisors (701888429).

2315821651 is a wasteful number, since it uses less digits than its factorization.

2315821651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 484.

The product of its digits is 14400, while the sum is 34.

The square root of 2315821651 is about 48122.9846435152. The cubic root of 2315821651 is about 1323.0259725120.

The spelling of 2315821651 in words is "two billion, three hundred fifteen million, eight hundred twenty-one thousand, six hundred fifty-one".