21262562271 has 12 divisors (see below), whose sum is σ = 30739288320. Its totient is φ = 14162719200.

The previous prime is 21262562261. The next prime is 21262562341. The reversal of 21262562271 is 17226526212.

21262562271 is a `hidden beast` number, since 2 + 1 + 2 + 6 + 25 + 622 + 7 + 1 = 666.

It is not a de Polignac number, because 21262562271 - 2¹⁰ = 21262561247 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21262562231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1015926 + ... + 1036643.

It is an arithmetic number, because the mean of its divisors is an integer number (2561607360).

Almost surely, 2^21262562271 is an apocalyptic number.

21262562271 is a deficient number, since it is larger than the sum of its proper divisors (9476726049).

21262562271 is a wasteful number, since it uses less digits than its factorization.

21262562271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2053726 (or 2053723 counting only the distinct ones).

The product of its digits is 40320, while the sum is 36.

The spelling of 21262562271 in words is "twenty-one billion, two hundred sixty-two million, five hundred sixty-two thousand, two hundred seventy-one".