22000456521 has 32 divisors (see below), whose sum is σ = 33532087680. Its totient is φ = 14245875648.

The previous prime is 22000456453. The next prime is 22000456523. The reversal of 22000456521 is 12565400022.

22000456521 is a `hidden beast` number, since 2 + 2 + 0 + 0 + 0 + 4 + 5 + 652 + 1 = 666.

It is not a de Polignac number, because 22000456521 - 2²³ = 21992067913 is a prime.

It is a super-2 number, since 2×22000456521² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (22000456523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 567655 + ... + 605171.

It is an arithmetic number, because the mean of its divisors is an integer number (1047877740).

Almost surely, 2^22000456521 is an apocalyptic number.

It is an amenable number.

22000456521 is a deficient number, since it is larger than the sum of its proper divisors (11531631159).

22000456521 is a wasteful number, since it uses less digits than its factorization.

22000456521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38150 (or 38144 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

Adding to 22000456521 its reverse (12565400022), we get a palindrome (34565856543).

The spelling of 22000456521 in words is "twenty-two billion, four hundred fifty-six thousand, five hundred twenty-one".