222426 has 20 divisors (see below), whose sum is σ = 498762. Its totient is φ = 74088.

The previous prime is 222419. The next prime is 222437. The reversal of 222426 is 624222.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 123201 + 99225 = 351^2 + 315^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a nialpdrome in base 12.

It is a junction number, because it is equal to n+sod(n) for n = 222399 and 222408.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 222426.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 525 + ... + 848.

2²²²⁴²⁶ is an apocalyptic number.

222426 is an abundant number, since it is smaller than the sum of its proper divisors (276336).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

222426 is a wasteful number, since it uses less digits than its factorization.

222426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1387 (or 1378 counting only the distinct ones).

The product of its digits is 384, while the sum is 18.

The square root of 222426 is about 471.6206102367. The cubic root of 222426 is about 60.5891952112.

Adding to 222426 its reverse (624222), we get a palindrome (846648).

The spelling of 222426 in words is "two hundred twenty-two thousand, four hundred twenty-six".