222531389 has 2 divisors, whose sum is σ = 222531390. Its totient is φ = 222531388.

The previous prime is 222531367. The next prime is 222531433. The reversal of 222531389 is 983135222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 147136900 + 75394489 = 12130^2 + 8683^2 .

It is a cyclic number.

It is not a de Polignac number, because 222531389 - 2¹² = 222527293 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (222531889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111265694 + 111265695.

It is an arithmetic number, because the mean of its divisors is an integer number (111265695).

Almost surely, 2^222531389 is an apocalyptic number.

It is an amenable number.

222531389 is a deficient number, since it is larger than the sum of its proper divisors (1).

222531389 is an equidigital number, since it uses as much as digits as its factorization.

222531389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25920, while the sum is 35.

The square root of 222531389 is about 14917.4860147412. The cubic root of 222531389 is about 605.9876307714.

The spelling of 222531389 in words is "two hundred twenty-two million, five hundred thirty-one thousand, three hundred eighty-nine".