22505700361 has 9 divisors (see below), whose sum is σ = 23074314343. Its totient is φ = 21950780080.

The previous prime is 22505700337. The next prime is 22505700367. The reversal of 22505700361 is 16300750522.

The square root of 22505700361 is 150019.

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

It can be written as a sum of positive squares in only one way, i.e., 1084450761 + 21421249600 = 32931^2 + 146360^2 .

It is not a de Polignac number, because 22505700361 - 2⁷ = 22505700233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22505700367) 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, 6148950 + ... + 6152608.

Almost surely, 2^22505700361 is an apocalyptic number.

22505700361 is the 150019-th square number.

22505700361 is the 75010-th centered octagonal number.

It is an amenable number.

22505700361 is a deficient number, since it is larger than the sum of its proper divisors (568613982).

22505700361 is an frugal number, since it uses more digits than its factorization.

22505700361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7400 (or 3700 counting only the distinct ones).

The product of its (nonzero) digits is 12600, while the sum is 31.

The spelling of 22505700361 in words is "twenty-two billion, five hundred five million, seven hundred thousand, three hundred sixty-one".