21050225224 has 16 divisors (see below), whose sum is σ = 45107625600. Its totient is φ = 9021525072.

The previous prime is 21050225179. The next prime is 21050225281. The reversal of 21050225224 is 42252205012.

It is a super-2 number, since 2×21050225224² (a number of 21 digits) contains 22 as substring.

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, 187948384 + ... + 187948495.

It is an arithmetic number, because the mean of its divisors is an integer number (2819226600).

Almost surely, 2^21050225224 is an apocalyptic number.

It is an amenable number.

21050225224 is an abundant number, since it is smaller than the sum of its proper divisors (24057400376).

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

21050225224 is a wasteful number, since it uses less digits than its factorization.

21050225224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 375896892 (or 375896888 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 25.

The spelling of 21050225224 in words is "twenty-one billion, fifty million, two hundred twenty-five thousand, two hundred twenty-four".