21922486531 has 4 divisors (see below), whose sum is σ = 23915439864. Its totient is φ = 19929533200.

The previous prime is 21922486517. The next prime is 21922486543. The reversal of 21922486531 is 13568422912.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21922486531 - 2¹³ = 21922478339 is a prime.

It is a super-2 number, since 2×21922486531² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21922486591) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 996476650 + ... + 996476671.

It is an arithmetic number, because the mean of its divisors is an integer number (5978859966).

Almost surely, 2^21922486531 is an apocalyptic number.

21922486531 is a deficient number, since it is larger than the sum of its proper divisors (1992953333).

21922486531 is a wasteful number, since it uses less digits than its factorization.

21922486531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1992953332.

The product of its digits is 207360, while the sum is 43.

The spelling of 21922486531 in words is "twenty-one billion, nine hundred twenty-two million, four hundred eighty-six thousand, five hundred thirty-one".