5515325021 has 2 divisors, whose sum is σ = 5515325022. Its totient is φ = 5515325020.

The previous prime is 5515324949. The next prime is 5515325077. The reversal of 5515325021 is 1205235155.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4625496121 + 889828900 = 68011^2 + 29830^2 .

It is a cyclic number.

It is not a de Polignac number, because 5515325021 - 2¹⁰ = 5515323997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5515345021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2757662510 + 2757662511.

It is an arithmetic number, because the mean of its divisors is an integer number (2757662511).

Almost surely, 2^5515325021 is an apocalyptic number.

It is an amenable number.

5515325021 is a deficient number, since it is larger than the sum of its proper divisors (1).

5515325021 is an equidigital number, since it uses as much as digits as its factorization.

5515325021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7500, while the sum is 29.

The square root of 5515325021 is about 74265.2342688017. The cubic root of 5515325021 is about 1766.8121219070.

The spelling of 5515325021 in words is "five billion, five hundred fifteen million, three hundred twenty-five thousand, twenty-one".