2257307761 has 2 divisors, whose sum is σ = 2257307762. Its totient is φ = 2257307760.

The previous prime is 2257307737. The next prime is 2257307807. The reversal of 2257307761 is 1677037522.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2222556736 + 34751025 = 47144^2 + 5895^2 .

It is a cyclic number.

It is not a de Polignac number, because 2257307761 - 2²¹ = 2255210609 is a prime.

It is not a weakly prime, because it can be changed into another prime (2257307161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1128653880 + 1128653881.

It is an arithmetic number, because the mean of its divisors is an integer number (1128653881).

Almost surely, 2^2257307761 is an apocalyptic number.

It is an amenable number.

2257307761 is a deficient number, since it is larger than the sum of its proper divisors (1).

2257307761 is an equidigital number, since it uses as much as digits as its factorization.

2257307761 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 123480, while the sum is 40.

The square root of 2257307761 is about 47511.1330216403. The cubic root of 2257307761 is about 1311.7878122747.

The spelling of 2257307761 in words is "two billion, two hundred fifty-seven million, three hundred seven thousand, seven hundred sixty-one".