222402431 has 4 divisors (see below), whose sum is σ = 222501552. Its totient is φ = 222303312.

The previous prime is 222402379. The next prime is 222402437. The reversal of 222402431 is 134204222.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-222402431 is a prime.

It is a super-2 number, since 2×222402431² = 98925682629419522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222402437) 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 in 3 ways as a sum of consecutive naturals, for example, 46115 + ... + 50708.

It is an arithmetic number, because the mean of its divisors is an integer number (55625388).

Almost surely, 2^222402431 is an apocalyptic number.

222402431 is a deficient number, since it is larger than the sum of its proper divisors (99121).

222402431 is an equidigital number, since it uses as much as digits as its factorization.

222402431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99120.

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 222402431 is about 14913.1630112461. The cubic root of 222402431 is about 605.8705505793.

Adding to 222402431 its reverse (134204222), we get a palindrome (356606653).

The spelling of 222402431 in words is "two hundred twenty-two million, four hundred two thousand, four hundred thirty-one".