2253756581 has 2 divisors, whose sum is σ = 2253756582. Its totient is φ = 2253756580.

The previous prime is 2253756559. The next prime is 2253756587. The reversal of 2253756581 is 1856573522.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2251977025 + 1779556 = 47455^2 + 1334^2 .

It is a cyclic number.

It is not a de Polignac number, because 2253756581 - 2¹⁰ = 2253755557 is a prime.

It is a super-2 number, since 2×2253756581² = 10158837452801619122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2253756587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1126878290 + 1126878291.

It is an arithmetic number, because the mean of its divisors is an integer number (1126878291).

Almost surely, 2^2253756581 is an apocalyptic number.

It is an amenable number.

2253756581 is a deficient number, since it is larger than the sum of its proper divisors (1).

2253756581 is an equidigital number, since it uses as much as digits as its factorization.

2253756581 is an evil number, because the sum of its binary digits is even.

The product of its digits is 504000, while the sum is 44.

The square root of 2253756581 is about 47473.7462288368. The cubic root of 2253756581 is about 1311.0995529078.

The spelling of 2253756581 in words is "two billion, two hundred fifty-three million, seven hundred fifty-six thousand, five hundred eighty-one".