2157266250 has 160 divisors (see below), whose sum is σ = 6140534400. Its totient is φ = 560880000.

The previous prime is 2157266249. The next prime is 2157266257. The reversal of 2157266250 is 526627512.

2157266250 is a `hidden beast` number, since 2 + 1 + 5 + 7 + 26 + 625 + 0 = 666.

It is not an unprimeable number, because it can be changed into a prime (2157266257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 1382971 + ... + 1384529.

It is an arithmetic number, because the mean of its divisors is an integer number (38378340).

Almost surely, 2^2157266250 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2157266250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3070267200).

2157266250 is an abundant number, since it is smaller than the sum of its proper divisors (3983268150).

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

2157266250 is a wasteful number, since it uses less digits than its factorization.

2157266250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1631 (or 1610 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 36.

The square root of 2157266250 is about 46446.3803756547. The cubic root of 2157266250 is about 1292.1152425105.

The spelling of 2157266250 in words is "two billion, one hundred fifty-seven million, two hundred sixty-six thousand, two hundred fifty".