1243003433431 has 4 divisors (see below), whose sum is σ = 1243055625112. Its totient is φ = 1242951241752.

The previous prime is 1243003433369. The next prime is 1243003433491. The reversal of 1243003433431 is 1343343003421.

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 1243003433431 - 2⁷ = 1243003433303 is a prime.

It is a super-2 number, since 2×1243003433431² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1243003433393 and 1243003433402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1243003433491) 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, 26060100 + ... + 26107753.

It is an arithmetic number, because the mean of its divisors is an integer number (310763906278).

Almost surely, 2^{1243003433431} is an apocalyptic number.

1243003433431 is a deficient number, since it is larger than the sum of its proper divisors (52191681).

1243003433431 is an equidigital number, since it uses as much as digits as its factorization.

1243003433431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52191680.

The product of its (nonzero) digits is 31104, while the sum is 31.

Adding to 1243003433431 its reverse (1343343003421), we get a palindrome (2586346436852).

The spelling of 1243003433431 in words is "one trillion, two hundred forty-three billion, three million, four hundred thirty-three thousand, four hundred thirty-one".