5615521 has 2 divisors, whose sum is σ = 5615522. Its totient is φ = 5615520.

The previous prime is 5615503. The next prime is 5615537. The reversal of 5615521 is 1255165.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4080400 + 1535121 = 2020^2 + 1239^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5615521 is a prime.

It is a super-2 number, since 2×5615521² = 63068152202882, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (5615551) 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, 2807760 + 2807761.

It is an arithmetic number, because the mean of its divisors is an integer number (2807761).

Almost surely, 2^5615521 is an apocalyptic number.

It is an amenable number.

5615521 is a deficient number, since it is larger than the sum of its proper divisors (1).

5615521 is an equidigital number, since it uses as much as digits as its factorization.

5615521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1500, while the sum is 25.

The square root of 5615521 is about 2369.7090538714. The cubic root of 5615521 is about 177.7447104151.

The spelling of 5615521 in words is "five million, six hundred fifteen thousand, five hundred twenty-one".