222451 has 4 divisors (see below), whose sum is σ = 227232. Its totient is φ = 217672.

The previous prime is 222437. The next prime is 222461. The reversal of 222451 is 154222.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 222451 - 2⁵ = 222419 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (222461) 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 in 3 ways as a sum of consecutive naturals, for example, 2320 + ... + 2413.

It is an arithmetic number, because the mean of its divisors is an integer number (56808).

2²²²⁴⁵¹ is an apocalyptic number.

222451 is a deficient number, since it is larger than the sum of its proper divisors (4781).

222451 is an equidigital number, since it uses as much as digits as its factorization.

222451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4780.

The product of its digits is 160, while the sum is 16.

The square root of 222451 is about 471.6471138468. The cubic root of 222451 is about 60.5914651394.

Adding to 222451 its reverse (154222), we get a palindrome (376673).

The spelling of 222451 in words is "two hundred twenty-two thousand, four hundred fifty-one".