223597231538 has 6 divisors (see below), whose sum is σ = 335396850399. Its totient is φ = 111798281406.

The previous prime is 223597231523. The next prime is 223597231541. The reversal of 223597231538 is 835132795322.

It can be written as a sum of positive squares in only one way, i.e., 111798615769 + 111798615769 = 334363^2 + 334363^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=334363.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 501545 + ... + 835907.

Almost surely, 2^223597231538 is an apocalyptic number.

223597231538 is a deficient number, since it is larger than the sum of its proper divisors (111799618861).

223597231538 is an frugal number, since it uses more digits than its factorization.

223597231538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 668728 (or 334365 counting only the distinct ones).

The product of its digits is 2721600, while the sum is 50.

Multiplying 223597231538 by its sum of digits (50), we get a square (11179861576900 = 3343630²).

The spelling of 223597231538 in words is "two hundred twenty-three billion, five hundred ninety-seven million, two hundred thirty-one thousand, five hundred thirty-eight".