22731506811049 has 3 divisors (see below), whose sum is σ = 22731511578807. Its totient is φ = 22731502043292.

The previous prime is 22731506811043. The next prime is 22731506811127. The reversal of 22731506811049 is 94011860513722.

It is a happy number.

The square root of 22731506811049 is 4767757.

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

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 291087225625 + 22440419585424 = 539525^2 + 4737132^2 .

It is not a de Polignac number, because 22731506811049 - 2⁵ = 22731506811017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22731506810993 and 22731506811011.

It is not an unprimeable number, because it can be changed into a prime (22731506811043) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 2383879 + ... + 7151635.

It is an arithmetic number, because the mean of its divisors is an integer number (7577170526269).

It is a 1-persistent number, because it is pandigital, but 2⋅22731506811049 = 45463013622098 is not.

Almost surely, 2^{22731506811049} is an apocalyptic number.

22731506811049 is the 4767757-th square number.

22731506811049 is the 2383879-th centered octagonal number.

It is an amenable number.

22731506811049 is a deficient number, since it is larger than the sum of its proper divisors (4767758).

22731506811049 is an frugal number, since it uses more digits than its factorization.

22731506811049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9535514 (or 4767757 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 49.

The spelling of 22731506811049 in words is "twenty-two trillion, seven hundred thirty-one billion, five hundred six million, eight hundred eleven thousand, forty-nine".