2315503621 has 2 divisors, whose sum is σ = 2315503622. Its totient is φ = 2315503620.

The previous prime is 2315503613. The next prime is 2315503627. The reversal of 2315503621 is 1263055132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1255284900 + 1060218721 = 35430^2 + 32561^2 .

It is a cyclic number.

It is not a de Polignac number, because 2315503621 - 2³ = 2315503613 is a prime.

It is a super-2 number, since 2×2315503621² = 10723114037728223282, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2315503621.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2315503627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1157751810 + 1157751811.

It is an arithmetic number, because the mean of its divisors is an integer number (1157751811).

Almost surely, 2^2315503621 is an apocalyptic number.

It is an amenable number.

2315503621 is a deficient number, since it is larger than the sum of its proper divisors (1).

2315503621 is an equidigital number, since it uses as much as digits as its factorization.

2315503621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5400, while the sum is 28.

The square root of 2315503621 is about 48119.6801838915. The cubic root of 2315503621 is about 1322.9654063608.

Adding to 2315503621 its reverse (1263055132), we get a palindrome (3578558753).

The spelling of 2315503621 in words is "two billion, three hundred fifteen million, five hundred three thousand, six hundred twenty-one".