222131549 has 2 divisors, whose sum is σ = 222131550. Its totient is φ = 222131548.

The previous prime is 222131491. The next prime is 222131573. The reversal of 222131549 is 945131222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 121771225 + 100360324 = 11035^2 + 10018^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-222131549 is a prime.

It is a super-2 number, since 2×222131549² = 98684850122278802, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (222131579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111065774 + 111065775.

It is an arithmetic number, because the mean of its divisors is an integer number (111065775).

Almost surely, 2^222131549 is an apocalyptic number.

It is an amenable number.

222131549 is a deficient number, since it is larger than the sum of its proper divisors (1).

222131549 is an equidigital number, since it uses as much as digits as its factorization.

222131549 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4320, while the sum is 29.

The square root of 222131549 is about 14904.0782673737. The cubic root of 222131549 is about 605.6244709804.

The spelling of 222131549 in words is "two hundred twenty-two million, one hundred thirty-one thousand, five hundred forty-nine".