21522014399 has 8 divisors (see below), whose sum is σ = 23523113088. Its totient is φ = 19602593280.

The previous prime is 21522014369. The next prime is 21522014401. The reversal of 21522014399 is 99341022512.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21522014399 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21522014329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20418842 + ... + 20419895.

It is an arithmetic number, because the mean of its divisors is an integer number (2940389136).

Almost surely, 2^21522014399 is an apocalyptic number.

21522014399 is a deficient number, since it is larger than the sum of its proper divisors (2001098689).

21522014399 is a wasteful number, since it uses less digits than its factorization.

21522014399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40838785.

The product of its (nonzero) digits is 38880, while the sum is 38.

The spelling of 21522014399 in words is "twenty-one billion, five hundred twenty-two million, fourteen thousand, three hundred ninety-nine".