222479381 has 2 divisors, whose sum is σ = 222479382. Its totient is φ = 222479380.

The previous prime is 222479359. The next prime is 222479393. The reversal of 222479381 is 183974222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 222159025 + 320356 = 14905^2 + 566^2 .

It is a cyclic number.

It is not a de Polignac number, because 222479381 - 2¹⁰ = 222478357 is a prime.

It is a super-2 number, since 2×222479381² = 98994149940286322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (222479311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111239690 + 111239691.

It is an arithmetic number, because the mean of its divisors is an integer number (111239691).

Almost surely, 2^222479381 is an apocalyptic number.

It is an amenable number.

222479381 is a deficient number, since it is larger than the sum of its proper divisors (1).

222479381 is an equidigital number, since it uses as much as digits as its factorization.

222479381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48384, while the sum is 38.

The square root of 222479381 is about 14915.7427237131. The cubic root of 222479381 is about 605.9404184651.

The spelling of 222479381 in words is "two hundred twenty-two million, four hundred seventy-nine thousand, three hundred eighty-one".