222731139136 has 189 divisors, whose sum is σ = 504910484589. Its totient is φ = 97409241600.

The previous prime is 222731139101. The next prime is 222731139143. The reversal of 222731139136 is 631931137222.

It is a happy number.

The square root of 222731139136 is 471944.

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., 202608014400 + 20123124736 = 450120^2 + 141856^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 1287463146 + ... + 1287463318.

Almost surely, 2^222731139136 is an apocalyptic number.

222731139136 is the 471944-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 222731139136

222731139136 is an abundant number, since it is smaller than the sum of its proper divisors (282179345453).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

222731139136 is an equidigital number, since it uses as much as digits as its factorization.

222731139136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 442 (or 217 counting only the distinct ones).

The product of its digits is 81648, while the sum is 40.

The spelling of 222731139136 in words is "two hundred twenty-two billion, seven hundred thirty-one million, one hundred thirty-nine thousand, one hundred thirty-six".