22374725521 has 4 divisors (see below), whose sum is σ = 22375169344. Its totient is φ = 22374281700.

The previous prime is 22374725459. The next prime is 22374725551. The reversal of 22374725521 is 12552747322.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12552747322 = 2 ⋅6276373661.

It is a cyclic number.

It is not a de Polignac number, because 22374725521 - 2¹³ = 22374717329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22374725551) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 134925 + ... + 250906.

It is an arithmetic number, because the mean of its divisors is an integer number (5593792336).

Almost surely, 2^22374725521 is an apocalyptic number.

It is an amenable number.

22374725521 is a deficient number, since it is larger than the sum of its proper divisors (443823).

22374725521 is an equidigital number, since it uses as much as digits as its factorization.

22374725521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 443822.

The product of its digits is 235200, while the sum is 40.

The spelling of 22374725521 in words is "twenty-two billion, three hundred seventy-four million, seven hundred twenty-five thousand, five hundred twenty-one".