2315072502821 has 4 divisors (see below), whose sum is σ = 2493155003052. Its totient is φ = 2136990002592.

The previous prime is 2315072502791. The next prime is 2315072502839. The reversal of 2315072502821 is 1282052705132.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 351399984100 + 1963672518721 = 592790^2 + 1401311^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2315072502821 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2315072502851) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 89041250096 + ... + 89041250121.

It is an arithmetic number, because the mean of its divisors is an integer number (623288750763).

Almost surely, 2^{2315072502821} is an apocalyptic number.

It is an amenable number.

2315072502821 is a deficient number, since it is larger than the sum of its proper divisors (178082500231).

2315072502821 is a wasteful number, since it uses less digits than its factorization.

2315072502821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178082500230.

The product of its (nonzero) digits is 67200, while the sum is 38.

The spelling of 2315072502821 in words is "two trillion, three hundred fifteen billion, seventy-two million, five hundred two thousand, eight hundred twenty-one".