222540431 has 2 divisors, whose sum is σ = 222540432. Its totient is φ = 222540430.

The previous prime is 222540401. The next prime is 222540443. The reversal of 222540431 is 134045222.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-222540431 is a prime.

It is a super-3 number, since 3×222540431³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 222540397 and 222540406.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (222540401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111270215 + 111270216.

It is an arithmetic number, because the mean of its divisors is an integer number (111270216).

Almost surely, 2^222540431 is an apocalyptic number.

222540431 is a deficient number, since it is larger than the sum of its proper divisors (1).

222540431 is an equidigital number, since it uses as much as digits as its factorization.

222540431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 222540431 is about 14917.7890788146. The cubic root of 222540431 is about 605.9958382516.

Adding to 222540431 its reverse (134045222), we get a palindrome (356585653).

The spelling of 222540431 in words is "two hundred twenty-two million, five hundred forty thousand, four hundred thirty-one".