222121573 has 2 divisors, whose sum is σ = 222121574. Its totient is φ = 222121572.

The previous prime is 222121547. The next prime is 222121589. The reversal of 222121573 is 375121222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 140707044 + 81414529 = 11862^2 + 9023^2 .

It is a cyclic number.

It is not a de Polignac number, because 222121573 - 2¹⁷ = 221990501 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (222121673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111060786 + 111060787.

It is an arithmetic number, because the mean of its divisors is an integer number (111060787).

Almost surely, 2^222121573 is an apocalyptic number.

It is an amenable number.

222121573 is a deficient number, since it is larger than the sum of its proper divisors (1).

222121573 is an equidigital number, since it uses as much as digits as its factorization.

222121573 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1680, while the sum is 25.

The square root of 222121573 is about 14903.7435901186. The cubic root of 222121573 is about 605.6154045808.

Adding to 222121573 its reverse (375121222), we get a palindrome (597242795).

The spelling of 222121573 in words is "two hundred twenty-two million, one hundred twenty-one thousand, five hundred seventy-three".