21552032210 has 8 divisors (see below), whose sum is σ = 38793657996. Its totient is φ = 8620812880.

The previous prime is 21552032197. The next prime is 21552032221. The reversal of 21552032210 is 1223025512.

It can be written as a sum of positive squares in 2 ways, for example, as 21179271961 + 372760249 = 145531^2 + 19307^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1077601601 + ... + 1077601620.

Almost surely, 2^21552032210 is an apocalyptic number.

21552032210 is a deficient number, since it is larger than the sum of its proper divisors (17241625786).

21552032210 is a wasteful number, since it uses less digits than its factorization.

21552032210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2155203228.

The product of its (nonzero) digits is 1200, while the sum is 23.

Adding to 21552032210 its reverse (1223025512), we get a palindrome (22775057722).

The spelling of 21552032210 in words is "twenty-one billion, five hundred fifty-two million, thirty-two thousand, two hundred ten".