223629331538 has 6 divisors (see below), whose sum is σ = 335445000471. Its totient is φ = 111814331382.

The previous prime is 223629331489. The next prime is 223629331567. The reversal of 223629331538 is 835133926322.

It can be written as a sum of positive squares in only one way, i.e., 111814665769 + 111814665769 = 334387^2 + 334387^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=334387.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 223629331492 and 223629331501.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 501581 + ... + 835967.

Almost surely, 2^223629331538 is an apocalyptic number.

223629331538 is a deficient number, since it is larger than the sum of its proper divisors (111815668933).

223629331538 is an frugal number, since it uses more digits than its factorization.

223629331538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 668776 (or 334389 counting only the distinct ones).

The product of its digits is 1399680, while the sum is 47.

The spelling of 223629331538 in words is "two hundred twenty-three billion, six hundred twenty-nine million, three hundred thirty-one thousand, five hundred thirty-eight".