2257457561 has 8 divisors (see below), whose sum is σ = 2305352448. Its totient is φ = 2209914000.

The previous prime is 2257457539. The next prime is 2257457593. The reversal of 2257457561 is 1657547522.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2257457561 is a prime.

It is a super-2 number, since 2×2257457561² = 10192229279432137442, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2257457261) 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 7 ways as a sum of consecutive naturals, for example, 74825 + ... + 100566.

It is an arithmetic number, because the mean of its divisors is an integer number (288169056).

Almost surely, 2^2257457561 is an apocalyptic number.

It is an amenable number.

2257457561 is a deficient number, since it is larger than the sum of its proper divisors (47894887).

2257457561 is a wasteful number, since it uses less digits than its factorization.

2257457561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175663.

The product of its digits is 588000, while the sum is 44.

The square root of 2257457561 is about 47512.7094680992. The cubic root of 2257457561 is about 1311.8168293588.

The spelling of 2257457561 in words is "two billion, two hundred fifty-seven million, four hundred fifty-seven thousand, five hundred sixty-one".