222431431 has 4 divisors (see below), whose sum is σ = 223317864. Its totient is φ = 221545000.

The previous prime is 222431371. The next prime is 222431441. The reversal of 222431431 is 134134222.

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 222431431 - 2¹³ = 222423239 is a prime.

It is a super-2 number, since 2×222431431² = 98951482993415522, 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 (222431441) 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, 442840 + ... + 443341.

It is an arithmetic number, because the mean of its divisors is an integer number (55829466).

Almost surely, 2^222431431 is an apocalyptic number.

222431431 is a deficient number, since it is larger than the sum of its proper divisors (886433).

222431431 is an equidigital number, since it uses as much as digits as its factorization.

222431431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 886432.

The product of its digits is 1152, while the sum is 22.

The square root of 222431431 is about 14914.1352749665. The cubic root of 222431431 is about 605.8968834485.

Adding to 222431431 its reverse (134134222), we get a palindrome (356565653).

The spelling of 222431431 in words is "two hundred twenty-two million, four hundred thirty-one thousand, four hundred thirty-one".