2257100561 has 4 divisors (see below), whose sum is σ = 2355235392. Its totient is φ = 2158965732.

The previous prime is 2257100543. The next prime is 2257100563. The reversal of 2257100561 is 1650017522.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1650017522 = 2 ⋅825008761.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2257100561 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2257100563) 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 in 3 ways as a sum of consecutive naturals, for example, 49067381 + ... + 49067426.

It is an arithmetic number, because the mean of its divisors is an integer number (588808848).

Almost surely, 2^2257100561 is an apocalyptic number.

It is an amenable number.

2257100561 is a deficient number, since it is larger than the sum of its proper divisors (98134831).

2257100561 is an equidigital number, since it uses as much as digits as its factorization.

2257100561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98134830.

The product of its (nonzero) digits is 4200, while the sum is 29.

The square root of 2257100561 is about 47508.9524300421. The cubic root of 2257100561 is about 1311.7476743788.

The spelling of 2257100561 in words is "two billion, two hundred fifty-seven million, one hundred thousand, five hundred sixty-one".