5565521501 has 2 divisors, whose sum is σ = 5565521502. Its totient is φ = 5565521500.

The previous prime is 5565521491. The next prime is 5565521509. The reversal of 5565521501 is 1051255655.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5016322276 + 549199225 = 70826^2 + 23435^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5565521501 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5565521509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2782760750 + 2782760751.

It is an arithmetic number, because the mean of its divisors is an integer number (2782760751).

Almost surely, 2^5565521501 is an apocalyptic number.

It is an amenable number.

5565521501 is a deficient number, since it is larger than the sum of its proper divisors (1).

5565521501 is an equidigital number, since it uses as much as digits as its factorization.

5565521501 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 37500, while the sum is 35.

The square root of 5565521501 is about 74602.4228896086. The cubic root of 5565521501 is about 1772.1560224074.

The spelling of 5565521501 in words is "five billion, five hundred sixty-five million, five hundred twenty-one thousand, five hundred one".