21522650611 has 8 divisors (see below), whose sum is σ = 26833434624. Its totient is φ = 16770896520.

The previous prime is 21522650587. The next prime is 21522650671. The reversal of 21522650611 is 11605622512.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21522650611 - 2⁷ = 21522650483 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21522650671) 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, 139757395 + ... + 139757548.

It is an arithmetic number, because the mean of its divisors is an integer number (3354179328).

Almost surely, 2^21522650611 is an apocalyptic number.

21522650611 is a deficient number, since it is larger than the sum of its proper divisors (5310784013).

21522650611 is a wasteful number, since it uses less digits than its factorization.

21522650611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 279514961.

The product of its (nonzero) digits is 7200, while the sum is 31.

The spelling of 21522650611 in words is "twenty-one billion, five hundred twenty-two million, six hundred fifty thousand, six hundred eleven".