21552210719 has 8 divisors (see below), whose sum is σ = 23470861680. Its totient is φ = 19670815296.

The previous prime is 21552210703. The next prime is 21552210721. The reversal of 21552210719 is 91701225512.

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 21552210719 - 2⁴ = 21552210703 is a prime.

It is a super-2 number, since 2×21552210719² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21552219719) 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, 9312677 + ... + 9314990.

It is an arithmetic number, because the mean of its divisors is an integer number (2933857710).

Almost surely, 2^21552210719 is an apocalyptic number.

21552210719 is a deficient number, since it is larger than the sum of its proper divisors (1918650961).

21552210719 is a wasteful number, since it uses less digits than its factorization.

21552210719 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18627769.

The product of its (nonzero) digits is 12600, while the sum is 35.

The spelling of 21552210719 in words is "twenty-one billion, five hundred fifty-two million, two hundred ten thousand, seven hundred nineteen".