2157525750 has 64 divisors (see below), whose sum is σ = 5421132288. Its totient is φ = 571500000.

The previous prime is 2157525719. The next prime is 2157525751. The reversal of 2157525750 is 575257512.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2157525699 and 2157525708.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2157525751) 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, 103725 + ... + 122775.

It is an arithmetic number, because the mean of its divisors is an integer number (84705192).

Almost surely, 2^2157525750 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2157525750, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2710566144).

2157525750 is an abundant number, since it is smaller than the sum of its proper divisors (3263606538).

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

2157525750 is a wasteful number, since it uses less digits than its factorization.

2157525750 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19222 (or 19212 counting only the distinct ones).

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

The square root of 2157525750 is about 46449.1738354946. The cubic root of 2157525750 is about 1292.1670504351.

The spelling of 2157525750 in words is "two billion, one hundred fifty-seven million, five hundred twenty-five thousand, seven hundred fifty".