223138778211 has 42 divisors (see below), whose sum is σ = 355392801732. Its totient is φ = 140008512960.

The previous prime is 223138778179. The next prime is 223138778221. The reversal of 223138778211 is 112877831322.

223138778211 is a `hidden beast` number, since 22 + 31 + 387 + 7 + 8 + 211 = 666.

It is not a de Polignac number, because 223138778211 - 2⁵ = 223138778179 is a prime.

It is a super-3 number, since 3×223138778211³ (a number of 35 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (223138778221) by changing a digit.

It is a polite number, since it can be written in 41 ways as a sum of consecutive naturals, for example, 318885 + ... + 740246.

Almost surely, 2^223138778211 is an apocalyptic number.

223138778211 is a deficient number, since it is larger than the sum of its proper divisors (132254023521).

223138778211 is an equidigital number, since it uses as much as digits as its factorization.

223138778211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1059183 (or 1059151 counting only the distinct ones).

The product of its digits is 225792, while the sum is 45.

The spelling of 223138778211 in words is "two hundred twenty-three billion, one hundred thirty-eight million, seven hundred seventy-eight thousand, two hundred eleven".