22372531061521 has 9 divisors (see below), whose sum is σ = 23766061320561. Its totient is φ = 21056424143232.

The previous prime is 22372531061477. The next prime is 22372531061537. The reversal of 22372531061521 is 12516013527322.

The square root of 22372531061521 is 4729961.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 1408586811921 + 20963944249600 = 1186839^2 + 4578640^2 .

It is not a de Polignac number, because 22372531061521 - 2¹⁵ = 22372531028753 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22372531061821) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 80270221 + ... + 80548453.

Almost surely, 2^{22372531061521} is an apocalyptic number.

22372531061521 is the 4729961-st square number.

22372531061521 is the 2364981-st centered octagonal number.

It is an amenable number.

22372531061521 is a deficient number, since it is larger than the sum of its proper divisors (1393530259040).

22372531061521 is an frugal number, since it uses more digits than its factorization.

22372531061521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 556500 (or 278250 counting only the distinct ones).

The product of its (nonzero) digits is 151200, while the sum is 40.

Adding to 22372531061521 its reverse (12516013527322), we get a palindrome (34888544588843).

The spelling of 22372531061521 in words is "twenty-two trillion, three hundred seventy-two billion, five hundred thirty-one million, sixty-one thousand, five hundred twenty-one".