90522521 has 2 divisors, whose sum is σ = 90522522. Its totient is φ = 90522520.

The previous prime is 90522493. The next prime is 90522527. The reversal of 90522521 is 12522509.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 68244121 + 22278400 = 8261^2 + 4720^2 .

It is a cyclic number.

It is not a de Polignac number, because 90522521 - 2¹⁴ = 90506137 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (90522527) 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, 45261260 + 45261261.

It is an arithmetic number, because the mean of its divisors is an integer number (45261261).

Almost surely, 2^90522521 is an apocalyptic number.

It is an amenable number.

90522521 is a deficient number, since it is larger than the sum of its proper divisors (1).

90522521 is an equidigital number, since it uses as much as digits as its factorization.

90522521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1800, while the sum is 26.

The square root of 90522521 is about 9514.3323990704. The cubic root of 90522521 is about 449.0060713164.

The spelling of 90522521 in words is "ninety million, five hundred twenty-two thousand, five hundred twenty-one".