21532500015210 has 24 divisors (see below), whose sum is σ = 55984500039780. Its totient is φ = 5742000004032.

The previous prime is 21532500015137. The next prime is 21532500015217. The reversal of 21532500015210 is 1251000523512.

21532500015210 is a `hidden beast` number, since 2 + 1 + 5 + 3 + 2 + 500 + 0 + 152 + 1 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 20195847252441 + 1336652762769 = 4493979^2 + 1156137^2 .

It is not an unprimeable number, because it can be changed into a prime (21532500015217) 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, 119624999995 + ... + 119625000174.

Almost surely, 2^{21532500015210} is an apocalyptic number.

21532500015210 is an abundant number, since it is smaller than the sum of its proper divisors (34452000024570).

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

21532500015210 is a wasteful number, since it uses less digits than its factorization.

21532500015210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239250000182 (or 239250000179 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 27.

Adding to 21532500015210 its reverse (1251000523512), we get a palindrome (22783500538722).

The spelling of 21532500015210 in words is "twenty-one trillion, five hundred thirty-two billion, five hundred million, fifteen thousand, two hundred ten".