422220431 has 4 divisors (see below), whose sum is σ = 433631832. Its totient is φ = 410809032.

The previous prime is 422220427. The next prime is 422220433. The reversal of 422220431 is 134022224.

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 422220431 - 2² = 422220427 is a prime.

It is a super-2 number, since 2×422220431² = 356540184707651522, 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 (422220433) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5705645 + ... + 5705718.

It is an arithmetic number, because the mean of its divisors is an integer number (108407958).

Almost surely, 2^422220431 is an apocalyptic number.

422220431 is a deficient number, since it is larger than the sum of its proper divisors (11411401).

422220431 is a wasteful number, since it uses less digits than its factorization.

422220431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11411400.

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

The square root of 422220431 is about 20548.0030903249. The cubic root of 422220431 is about 750.2046440079.

Adding to 422220431 its reverse (134022224), we get a palindrome (556242655).

The spelling of 422220431 in words is "four hundred twenty-two million, two hundred twenty thousand, four hundred thirty-one".