1224431551 has 12 divisors (see below), whose sum is σ = 1425064752. Its totient is φ = 1048977888.

The previous prime is 1224431449. The next prime is 1224431557. The reversal of 1224431551 is 1551344221.

It is a de Polignac number, because none of the positive numbers 2^k-1224431551 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1224431557) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 113571 + ... + 123883.

It is an arithmetic number, because the mean of its divisors is an integer number (118755396).

Almost surely, 2^1224431551 is an apocalyptic number.

1224431551 is a deficient number, since it is larger than the sum of its proper divisors (200633201).

1224431551 is a wasteful number, since it uses less digits than its factorization.

1224431551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12750 (or 12743 counting only the distinct ones).

The product of its digits is 4800, while the sum is 28.

The square root of 1224431551 is about 34991.8783576989. The cubic root of 1224431551 is about 1069.8219492946.

Adding to 1224431551 its reverse (1551344221), we get a palindrome (2775775772).

The spelling of 1224431551 in words is "one billion, two hundred twenty-four million, four hundred thirty-one thousand, five hundred fifty-one".