2315533621 has 2 divisors, whose sum is σ = 2315533622. Its totient is φ = 2315533620.

The previous prime is 2315533523. The next prime is 2315533651. The reversal of 2315533621 is 1263355132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2144708721 + 170824900 = 46311^2 + 13070^2 .

It is a cyclic number.

It is not a de Polignac number, because 2315533621 - 2⁹ = 2315533109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2315533651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1157766810 + 1157766811.

It is an arithmetic number, because the mean of its divisors is an integer number (1157766811).

Almost surely, 2^2315533621 is an apocalyptic number.

It is an amenable number.

2315533621 is a deficient number, since it is larger than the sum of its proper divisors (1).

2315533621 is an equidigital number, since it uses as much as digits as its factorization.

2315533621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16200, while the sum is 31.

The square root of 2315533621 is about 48119.9919056519. The cubic root of 2315533621 is about 1322.9711198465.

Adding to 2315533621 its reverse (1263355132), we get a palindrome (3578888753).

The spelling of 2315533621 in words is "two billion, three hundred fifteen million, five hundred thirty-three thousand, six hundred twenty-one".