2157755250 has 64 divisors (see below), whose sum is σ = 6155165952. Its totient is φ = 493200000.

The previous prime is 2157755231. The next prime is 2157755251. The reversal of 2157755250 is 525577512.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2157755199 and 2157755208.

It is not an unprimeable number, because it can be changed into a prime (2157755251) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 200251 + ... + 210750.

It is an arithmetic number, because the mean of its divisors is an integer number (96174468).

Almost surely, 2^2157755250 is an apocalyptic number.

2157755250 is an abundant number, since it is smaller than the sum of its proper divisors (3997410702).

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

2157755250 is a wasteful number, since it uses less digits than its factorization.

2157755250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 411028 (or 411018 counting only the distinct ones).

The product of its (nonzero) digits is 122500, while the sum is 39.

The square root of 2157755250 is about 46451.6442120190. The cubic root of 2157755250 is about 1292.2128655427.

The spelling of 2157755250 in words is "two billion, one hundred fifty-seven million, seven hundred fifty-five thousand, two hundred fifty".