2256245521 has 2 divisors, whose sum is σ = 2256245522. Its totient is φ = 2256245520.

The previous prime is 2256245507. The next prime is 2256245567. The reversal of 2256245521 is 1255426522.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2255205121 + 1040400 = 47489^2 + 1020^2 .

It is a cyclic number.

It is not a de Polignac number, because 2256245521 - 2⁵ = 2256245489 is a prime.

It is a super-2 number, since 2×2256245521² = 10181287702065122882, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2256245581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1128122760 + 1128122761.

It is an arithmetic number, because the mean of its divisors is an integer number (1128122761).

Almost surely, 2^2256245521 is an apocalyptic number.

It is an amenable number.

2256245521 is a deficient number, since it is larger than the sum of its proper divisors (1).

2256245521 is an equidigital number, since it uses as much as digits as its factorization.

2256245521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48000, while the sum is 34.

The square root of 2256245521 is about 47499.9528526082. The cubic root of 2256245521 is about 1311.5820137064.

The spelling of 2256245521 in words is "two billion, two hundred fifty-six million, two hundred forty-five thousand, five hundred twenty-one".