222020431 has 4 divisors (see below), whose sum is σ = 222098472. Its totient is φ = 221942392.

The previous prime is 222020413. The next prime is 222020437. The reversal of 222020431 is 134020222.

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 222020431 - 2⁷ = 222020303 is a prime.

It is a super-2 number, since 2×222020431² = 98586143562851522, 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 (222020437) 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, 34585 + ... + 40498.

It is an arithmetic number, because the mean of its divisors is an integer number (55524618).

Almost surely, 2^222020431 is an apocalyptic number.

222020431 is a deficient number, since it is larger than the sum of its proper divisors (78041).

222020431 is an equidigital number, since it uses as much as digits as its factorization.

222020431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78040.

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 222020431 is about 14900.3500294456. The cubic root of 222020431 is about 605.5234692622.

Adding to 222020431 its reverse (134020222), we get a palindrome (356040653).

The spelling of 222020431 in words is "two hundred twenty-two million, twenty thousand, four hundred thirty-one".