2157257000 has 32 divisors (see below), whose sum is σ = 5047983720. Its totient is φ = 862902400.

The previous prime is 2157256999. The next prime is 2157257021. The reversal of 2157257000 is 7527512.

It can be written as a sum of positive squares in 4 ways, for example, as 163277284 + 1993979716 = 12778^2 + 44654^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1077629 + ... + 1079628.

Almost surely, 2^2157257000 is an apocalyptic number.

2157257000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2157257000 is an abundant number, since it is smaller than the sum of its proper divisors (2890726720).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2157257000 is a wasteful number, since it uses less digits than its factorization.

2157257000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2157278 (or 2157264 counting only the distinct ones).

The product of its (nonzero) digits is 4900, while the sum is 29.

The square root of 2157257000 is about 46446.2807983589. The cubic root of 2157257000 is about 1292.1133957158.

The spelling of 2157257000 in words is "two billion, one hundred fifty-seven million, two hundred fifty-seven thousand".