2315636621 has 8 divisors (see below), whose sum is σ = 2385842040. Its totient is φ = 2246413312.

The previous prime is 2315636599. The next prime is 2315636629. The reversal of 2315636621 is 1266365132.

It can be written as a sum of positive squares in 4 ways, for example, as 131102500 + 2184534121 = 11450^2 + 46739^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2315636621 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2315636629) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 240740 + ... + 250173.

It is an arithmetic number, because the mean of its divisors is an integer number (298230255).

Almost surely, 2^2315636621 is an apocalyptic number.

It is an amenable number.

2315636621 is a deficient number, since it is larger than the sum of its proper divisors (70205419).

2315636621 is an equidigital number, since it uses as much as digits as its factorization.

2315636621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 491055.

The product of its digits is 38880, while the sum is 35.

The square root of 2315636621 is about 48121.0621349945. The cubic root of 2315636621 is about 1322.9907357720.

The spelling of 2315636621 in words is "two billion, three hundred fifteen million, six hundred thirty-six thousand, six hundred twenty-one".