2521222801 has 2 divisors, whose sum is σ = 2521222802. Its totient is φ = 2521222800.

The previous prime is 2521222789. The next prime is 2521222811. The reversal of 2521222801 is 1082221252.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1595603025 + 925619776 = 39945^2 + 30424^2 .

It is a cyclic number.

It is not a de Polignac number, because 2521222801 - 2⁷ = 2521222673 is a prime.

It is not a weakly prime, because it can be changed into another prime (2521222811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1260611400 + 1260611401.

It is an arithmetic number, because the mean of its divisors is an integer number (1260611401).

Almost surely, 2^2521222801 is an apocalyptic number.

It is an amenable number.

2521222801 is a deficient number, since it is larger than the sum of its proper divisors (1).

2521222801 is an equidigital number, since it uses as much as digits as its factorization.

2521222801 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1280, while the sum is 25.

The square root of 2521222801 is about 50211.7795044151. The cubic root of 2521222801 is about 1361.0384947587.

The spelling of 2521222801 in words is "two billion, five hundred twenty-one million, two hundred twenty-two thousand, eight hundred one".