2222222731 has 2 divisors, whose sum is σ = 2222222732. Its totient is φ = 2222222730.

The previous prime is 2222222707. The next prime is 2222222747. The reversal of 2222222731 is 1372222222.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2222222731 - 2¹¹ = 2222220683 is a prime.

It is a super-3 number, since 3×2222222731³ (a number of 29 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 2222222696 and 2222222705.

It is not a weakly prime, because it can be changed into another prime (2222222791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1111111365 + 1111111366.

It is an arithmetic number, because the mean of its divisors is an integer number (1111111366).

Almost surely, 2^2222222731 is an apocalyptic number.

2222222731 is a deficient number, since it is larger than the sum of its proper divisors (1).

2222222731 is an equidigital number, since it uses as much as digits as its factorization.

2222222731 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2688, while the sum is 25.

The square root of 2222222731 is about 47140.4574755061. The cubic root of 2222222731 is about 1304.9559799795.

Adding to 2222222731 its reverse (1372222222), we get a palindrome (3594444953).

The spelling of 2222222731 in words is "two billion, two hundred twenty-two million, two hundred twenty-two thousand, seven hundred thirty-one".