222731 has 2 divisors, whose sum is σ = 222732. Its totient is φ = 222730.

The previous prime is 222713. The next prime is 222773. The reversal of 222731 is 137222.

222731 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

Together with previous prime (222713) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 222731 - 2¹⁰ = 221707 is a prime.

It is a super-2 number, since 2×222731² = 99218196722, which contains 22 as substring.

It is a Sophie Germain prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (222791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111365 + 111366.

It is an arithmetic number, because the mean of its divisors is an integer number (111366).

2²²²⁷³¹ is an apocalyptic number.

222731 is a deficient number, since it is larger than the sum of its proper divisors (1).

222731 is an equidigital number, since it uses as much as digits as its factorization.

222731 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 168, while the sum is 17.

The square root of 222731 is about 471.9438525927. The cubic root of 222731 is about 60.6168767236.

Adding to 222731 its reverse (137222), we get a palindrome (359953).

The spelling of 222731 in words is "two hundred twenty-two thousand, seven hundred thirty-one".