2115132521 has 2 divisors, whose sum is σ = 2115132522. Its totient is φ = 2115132520.

The previous prime is 2115132479. The next prime is 2115132541. The reversal of 2115132521 is 1252315112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2114988121 + 144400 = 45989^2 + 380^2 .

It is a cyclic number.

It is not a de Polignac number, because 2115132521 - 2¹⁸ = 2114870377 is a prime.

It is not a weakly prime, because it can be changed into another prime (2115132541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1057566260 + 1057566261.

It is an arithmetic number, because the mean of its divisors is an integer number (1057566261).

Almost surely, 2^2115132521 is an apocalyptic number.

It is an amenable number.

2115132521 is a deficient number, since it is larger than the sum of its proper divisors (1).

2115132521 is an equidigital number, since it uses as much as digits as its factorization.

2115132521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 600, while the sum is 23.

The square root of 2115132521 is about 45990.5699138421. The cubic root of 2115132521 is about 1283.6477411628.

Adding to 2115132521 its reverse (1252315112), we get a palindrome (3367447633).

The spelling of 2115132521 in words is "two billion, one hundred fifteen million, one hundred thirty-two thousand, five hundred twenty-one".