21522270051 has 64 divisors (see below), whose sum is σ = 33013785600. Its totient is φ = 13850673408.

The previous prime is 21522270031. The next prime is 21522270053. The reversal of 21522270051 is 15007222512.

21522270051 is a `hidden beast` number, since 21 + 522 + 2 + 70 + 0 + 51 = 666.

It is not a de Polignac number, because 21522270051 - 2⁵ = 21522270019 is a prime.

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

It is a junction number, because it is equal to n+sod(n) for n = 21522269997 and 21522270024.

It is not an unprimeable number, because it can be changed into a prime (21522270053) 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 63 ways as a sum of consecutive naturals, for example, 44193330 + ... + 44193816.

It is an arithmetic number, because the mean of its divisors is an integer number (515840400).

Almost surely, 2^21522270051 is an apocalyptic number.

21522270051 is a deficient number, since it is larger than the sum of its proper divisors (11491515549).

21522270051 is a wasteful number, since it uses less digits than its factorization.

21522270051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 985 (or 979 counting only the distinct ones).

The product of its (nonzero) digits is 2800, while the sum is 27.

Adding to 21522270051 its reverse (15007222512), we get a palindrome (36529492563).

The spelling of 21522270051 in words is "twenty-one billion, five hundred twenty-two million, two hundred seventy thousand, fifty-one".