21522022512 has 40 divisors (see below), whose sum is σ = 55682753040. Its totient is φ = 7163143680.

The previous prime is 21522022477. The next prime is 21522022517.

21522022512 is nontrivially palindromic in base 10.

It is a super-3 number, since 3×21522022512³ (a number of 32 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21522022517) 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, 307437 + ... + 370892.

It is an arithmetic number, because the mean of its divisors is an integer number (1392068826).

Almost surely, 2^21522022512 is an apocalyptic number.

It is an amenable number.

21522022512 is an abundant number, since it is smaller than the sum of its proper divisors (34160730528).

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

21522022512 is a wasteful number, since it uses less digits than its factorization.

21522022512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 679001 (or 678995 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 24.

It can be divided in two parts, 215220 and 22512, that added together give a palindrome (237732).

The spelling of 21522022512 in words is "twenty-one billion, five hundred twenty-two million, twenty-two thousand, five hundred twelve".