1222445431 has 4 divisors (see below), whose sum is σ = 1222605000. Its totient is φ = 1222285864.

The previous prime is 1222445407. The next prime is 1222445437. The reversal of 1222445431 is 1345442221.

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-1222445431 is a prime.

It is a super-2 number, since 2×1222445431² = 2988745663545551522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1222445431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222445437) 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, 67681 + ... + 83818.

It is an arithmetic number, because the mean of its divisors is an integer number (305651250).

Almost surely, 2^1222445431 is an apocalyptic number.

1222445431 is a deficient number, since it is larger than the sum of its proper divisors (159569).

1222445431 is an equidigital number, since it uses as much as digits as its factorization.

1222445431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159568.

The product of its digits is 7680, while the sum is 28.

The square root of 1222445431 is about 34963.4871115568. The cubic root of 1222445431 is about 1069.2431923839.

Adding to 1222445431 its reverse (1345442221), we get a palindrome (2567887652).

The spelling of 1222445431 in words is "one billion, two hundred twenty-two million, four hundred forty-five thousand, four hundred thirty-one".