21522530451 has 8 divisors (see below), whose sum is σ = 30384748944. Its totient is φ = 13504332800.

The previous prime is 21522530411. The next prime is 21522530453. The reversal of 21522530451 is 15403522512.

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

It is a cyclic number.

It is not a de Polignac number, because 21522530451 - 2⁹ = 21522529939 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21522530453) 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, 211005150 + ... + 211005251.

It is an arithmetic number, because the mean of its divisors is an integer number (3798093618).

Almost surely, 2^21522530451 is an apocalyptic number.

21522530451 is a deficient number, since it is larger than the sum of its proper divisors (8862218493).

21522530451 is a wasteful number, since it uses less digits than its factorization.

21522530451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 422010421.

The product of its (nonzero) digits is 12000, while the sum is 30.

The spelling of 21522530451 in words is "twenty-one billion, five hundred twenty-two million, five hundred thirty thousand, four hundred fifty-one".