222531421 has 8 divisors (see below), whose sum is σ = 258632640. Its totient is φ = 187507968.

The previous prime is 222531389. The next prime is 222531433. The reversal of 222531421 is 124135222.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 222531421 - 2⁵ = 222531389 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 222531392 and 222531401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222531451) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 268996 + ... + 269821.

It is an arithmetic number, because the mean of its divisors is an integer number (32329080).

Almost surely, 2^222531421 is an apocalyptic number.

It is an amenable number.

222531421 is a deficient number, since it is larger than the sum of its proper divisors (36101219).

222531421 is an equidigital number, since it uses as much as digits as its factorization.

222531421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 538883.

The product of its digits is 960, while the sum is 22.

The square root of 222531421 is about 14917.4870873080. The cubic root of 222531421 is about 605.9876598184.

Adding to 222531421 its reverse (124135222), we get a palindrome (346666643).

The spelling of 222531421 in words is "two hundred twenty-two million, five hundred thirty-one thousand, four hundred twenty-one".