2522520661 has 2 divisors, whose sum is σ = 2522520662. Its totient is φ = 2522520660.

The previous prime is 2522520643. The next prime is 2522520683. The reversal of 2522520661 is 1660252252.

It is a happy number.

2522520661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2216620561 + 305900100 = 47081^2 + 17490^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2522520661 is a prime.

It is a super-2 number, since 2×2522520661² = 12726220970343753842, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2522520631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1261260330 + 1261260331.

It is an arithmetic number, because the mean of its divisors is an integer number (1261260331).

Almost surely, 2^2522520661 is an apocalyptic number.

It is an amenable number.

2522520661 is a deficient number, since it is larger than the sum of its proper divisors (1).

2522520661 is an equidigital number, since it uses as much as digits as its factorization.

2522520661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14400, while the sum is 31.

The square root of 2522520661 is about 50224.7017014536. The cubic root of 2522520661 is about 1361.2719971160.

The spelling of 2522520661 in words is "two billion, five hundred twenty-two million, five hundred twenty thousand, six hundred sixty-one".