1243433231 has 8 divisors (see below), whose sum is σ = 1251052944. Its totient is φ = 1235836800.

The previous prime is 1243433179. The next prime is 1243433239. The reversal of 1243433231 is 1323343421.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1243433231 is a prime.

It is a super-2 number, since 2×1243433231² = 3092252399910198722, 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 1243433231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1243433239) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 108005 + ... + 118961.

It is an arithmetic number, because the mean of its divisors is an integer number (156381618).

Almost surely, 2^1243433231 is an apocalyptic number.

1243433231 is a deficient number, since it is larger than the sum of its proper divisors (7619713).

1243433231 is a wasteful number, since it uses less digits than its factorization.

1243433231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11641.

The product of its digits is 5184, while the sum is 26.

The square root of 1243433231 is about 35262.3486313660. The cubic root of 1243433231 is about 1075.3276754117.

Adding to 1243433231 its reverse (1323343421), we get a palindrome (2566776652).

The spelling of 1243433231 in words is "one billion, two hundred forty-three million, four hundred thirty-three thousand, two hundred thirty-one".