21552022153253 has 16 divisors (see below), whose sum is σ = 21875806632960. Its totient is φ = 21230533272000.

The previous prime is 21552022153243. The next prime is 21552022153261. The reversal of 21552022153253 is 35235122025512.

It is a cyclic number.

It is not a de Polignac number, because 21552022153253 - 2¹⁰ = 21552022152229 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 (21552022153243) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32678588 + ... + 33331578.

It is an arithmetic number, because the mean of its divisors is an integer number (1367237914560).

Almost surely, 2^{21552022153253} is an apocalyptic number.

It is an amenable number.

21552022153253 is a deficient number, since it is larger than the sum of its proper divisors (323784479707).

21552022153253 is a wasteful number, since it uses less digits than its factorization.

21552022153253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 654748.

The product of its (nonzero) digits is 180000, while the sum is 38.

Adding to 21552022153253 its reverse (35235122025512), we get a palindrome (56787144178765).

The spelling of 21552022153253 in words is "twenty-one trillion, five hundred fifty-two billion, twenty-two million, one hundred fifty-three thousand, two hundred fifty-three".