222872581 has 2 divisors, whose sum is σ = 222872582. Its totient is φ = 222872580.

The previous prime is 222872557. The next prime is 222872593. The reversal of 222872581 is 185278222.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 191130625 + 31741956 = 13825^2 + 5634^2 .

It is a cyclic number.

It is not a de Polignac number, because 222872581 - 2⁵ = 222872549 is a prime.

It is a super-2 number, since 2×222872581² = 99344374723203122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 222872581.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (222872521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111436290 + 111436291.

It is an arithmetic number, because the mean of its divisors is an integer number (111436291).

Almost surely, 2^222872581 is an apocalyptic number.

It is an amenable number.

222872581 is a deficient number, since it is larger than the sum of its proper divisors (1).

222872581 is an equidigital number, since it uses as much as digits as its factorization.

222872581 is an evil number, because the sum of its binary digits is even.

The product of its digits is 35840, while the sum is 37.

The square root of 222872581 is about 14928.9176097934. The cubic root of 222872581 is about 606.2971789408.

The spelling of 222872581 in words is "two hundred twenty-two million, eight hundred seventy-two thousand, five hundred eighty-one".