2257170621 has 8 divisors (see below), whose sum is σ = 3011370720. Its totient is φ = 1503875472.

The previous prime is 2257170613. The next prime is 2257170623. The reversal of 2257170621 is 1260717522.

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

It is not a de Polignac number, because 2257170621 - 2³ = 2257170613 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2257170623) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 220395 + ... + 230408.

It is an arithmetic number, because the mean of its divisors is an integer number (376421340).

Almost surely, 2^2257170621 is an apocalyptic number.

It is an amenable number.

2257170621 is a deficient number, since it is larger than the sum of its proper divisors (754200099).

2257170621 is a wasteful number, since it uses less digits than its factorization.

2257170621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 452475.

The product of its (nonzero) digits is 11760, while the sum is 33.

The square root of 2257170621 is about 47509.6897590376. The cubic root of 2257170621 is about 1311.7612463766.

The spelling of 2257170621 in words is "two billion, two hundred fifty-seven million, one hundred seventy thousand, six hundred twenty-one".