222623477 has 2 divisors, whose sum is σ = 222623478. Its totient is φ = 222623476.

The previous prime is 222623473. The next prime is 222623491. The reversal of 222623477 is 774326222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 203034001 + 19589476 = 14249^2 + 4426^2 .

It is a cyclic number.

It is not a de Polignac number, because 222623477 - 2² = 222623473 is a prime.

It is a super-2 number, since 2×222623477² = 99122425023139058, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (222623473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111311738 + 111311739.

It is an arithmetic number, because the mean of its divisors is an integer number (111311739).

Almost surely, 2^222623477 is an apocalyptic number.

It is an amenable number.

222623477 is a deficient number, since it is larger than the sum of its proper divisors (1).

222623477 is an equidigital number, since it uses as much as digits as its factorization.

222623477 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 56448, while the sum is 35.

The square root of 222623477 is about 14920.5722745476. The cubic root of 222623477 is about 606.0712092324.

Adding to 222623477 its reverse (774326222), we get a palindrome (996949699).

The spelling of 222623477 in words is "two hundred twenty-two million, six hundred twenty-three thousand, four hundred seventy-seven".