2157528501 has 16 divisors (see below), whose sum is σ = 3335310720. Its totient is φ = 1375814880.

The previous prime is 2157528491. The next prime is 2157528509. The reversal of 2157528501 is 1058257512.

2157528501 is a `hidden beast` number, since 2 + 1 + 575 + 2 + 85 + 0 + 1 = 666.

It is not a de Polignac number, because 2157528501 - 2⁵ = 2157528469 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2157528509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1736520 + ... + 1737761.

It is an arithmetic number, because the mean of its divisors is an integer number (208456920).

Almost surely, 2^2157528501 is an apocalyptic number.

It is an amenable number.

2157528501 is a deficient number, since it is larger than the sum of its proper divisors (1177782219).

2157528501 is a wasteful number, since it uses less digits than its factorization.

2157528501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3474313 (or 3474307 counting only the distinct ones).

The product of its (nonzero) digits is 28000, while the sum is 36.

The square root of 2157528501 is about 46449.2034484984. The cubic root of 2157528501 is about 1292.1675996367.

The spelling of 2157528501 in words is "two billion, one hundred fifty-seven million, five hundred twenty-eight thousand, five hundred one".