21522246600 has 48 divisors (see below), whose sum is σ = 66718966320. Its totient is φ = 5739265600.

The previous prime is 21522246553. The next prime is 21522246631. The reversal of 21522246600 is 664222512.

It is a happy number.

It is a super-2 number, since 2×21522246600² (a number of 21 digits) contains 22 as substring.

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

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17934606 + ... + 17935805.

It is an arithmetic number, because the mean of its divisors is an integer number (1389978465).

Almost surely, 2^21522246600 is an apocalyptic number.

21522246600 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21522246600 is an abundant number, since it is smaller than the sum of its proper divisors (45196719720).

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

21522246600 is a wasteful number, since it uses less digits than its factorization.

21522246600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35870430 (or 35870421 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 30.

The spelling of 21522246600 in words is "twenty-one billion, five hundred twenty-two million, two hundred forty-six thousand, six hundred".