21522453311 has 8 divisors (see below), whose sum is σ = 21575660400. Its totient is φ = 21469311360.

The previous prime is 21522453301. The next prime is 21522453317. The reversal of 21522453311 is 11335422512.

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-21522453311 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 (21522453317) 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, 681785 + ... + 712653.

It is an arithmetic number, because the mean of its divisors is an integer number (2696957550).

Almost surely, 2^21522453311 is an apocalyptic number.

21522453311 is a deficient number, since it is larger than the sum of its proper divisors (53207089).

21522453311 is a wasteful number, since it uses less digits than its factorization.

21522453311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32569.

The product of its digits is 7200, while the sum is 29.

Adding to 21522453311 its reverse (11335422512), we get a palindrome (32857875823).

The spelling of 21522453311 in words is "twenty-one billion, five hundred twenty-two million, four hundred fifty-three thousand, three hundred eleven".