2251998857 has 16 divisors (see below), whose sum is σ = 2476656000. Its totient is φ = 2038176000.

The previous prime is 2251998829. The next prime is 2251998863. The reversal of 2251998857 is 7588991522.

It is a cyclic number.

It is not a de Polignac number, because 2251998857 - 2¹⁰ = 2251997833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2251998877) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 114644 + ... + 132842.

It is an arithmetic number, because the mean of its divisors is an integer number (154791000).

Almost surely, 2^2251998857 is an apocalyptic number.

It is an amenable number.

2251998857 is a deficient number, since it is larger than the sum of its proper divisors (224657143).

2251998857 is a wasteful number, since it uses less digits than its factorization.

2251998857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18496.

The product of its digits is 3628800, while the sum is 56.

The square root of 2251998857 is about 47455.2300278905. The cubic root of 2251998857 is about 1310.7586183481.

The spelling of 2251998857 in words is "two billion, two hundred fifty-one million, nine hundred ninety-eight thousand, eight hundred fifty-seven".