21525531150 has 24 divisors (see below), whose sum is σ = 53383317624. Its totient is φ = 5740141600.

The previous prime is 21525531127. The next prime is 21525531151. The reversal of 21525531150 is 5113552512.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21525531151) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 71751621 + ... + 71751920.

It is an arithmetic number, because the mean of its divisors is an integer number (2224304901).

Almost surely, 2^21525531150 is an apocalyptic number.

21525531150 is an abundant number, since it is smaller than the sum of its proper divisors (31857786474).

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

21525531150 is a wasteful number, since it uses less digits than its factorization.

21525531150 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143503556 (or 143503551 counting only the distinct ones).

The product of its (nonzero) digits is 7500, while the sum is 30.

The spelling of 21525531150 in words is "twenty-one billion, five hundred twenty-five million, five hundred thirty-one thousand, one hundred fifty".