2315037821 has 2 divisors, whose sum is σ = 2315037822. Its totient is φ = 2315037820.

The previous prime is 2315037763. The next prime is 2315037859. The reversal of 2315037821 is 1287305132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1788105796 + 526932025 = 42286^2 + 22955^2 .

It is a cyclic number.

It is not a de Polignac number, because 2315037821 - 2¹⁸ = 2314775677 is a prime.

It is a super-2 number, since 2×2315037821² = 10718800225320856082, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2315087821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1157518910 + 1157518911.

It is an arithmetic number, because the mean of its divisors is an integer number (1157518911).

Almost surely, 2^2315037821 is an apocalyptic number.

It is an amenable number.

2315037821 is a deficient number, since it is larger than the sum of its proper divisors (1).

2315037821 is an equidigital number, since it uses as much as digits as its factorization.

2315037821 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 2315037821 is about 48114.8399249130. The cubic root of 2315037821 is about 1322.8766886398.

The spelling of 2315037821 in words is "two billion, three hundred fifteen million, thirty-seven thousand, eight hundred twenty-one".