21573750227 has 8 divisors (see below), whose sum is σ = 23164525152. Its totient is φ = 20018723200.

The previous prime is 21573750217. The next prime is 21573750251. The reversal of 21573750227 is 72205737512.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 21573750227 - 2²² = 21569555923 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21573750217) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8935724 + ... + 8938137.

It is an arithmetic number, because the mean of its divisors is an integer number (2895565644).

Almost surely, 2^21573750227 is an apocalyptic number.

21573750227 is a deficient number, since it is larger than the sum of its proper divisors (1590774925).

21573750227 is a wasteful number, since it uses less digits than its factorization.

21573750227 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17873949.

The product of its (nonzero) digits is 205800, while the sum is 41.

The spelling of 21573750227 in words is "twenty-one billion, five hundred seventy-three million, seven hundred fifty thousand, two hundred twenty-seven".