1012443431 has 4 divisors (see below), whose sum is σ = 1012842864. Its totient is φ = 1012044000.

The previous prime is 1012443409. The next prime is 1012443433. The reversal of 1012443431 is 1343442101.

1012443431 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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-1012443431 is a prime.

It is a super-2 number, since 2×1012443431² = 2050083401950103522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1012443397 and 1012443406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1012443433) 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, 195890 + ... + 200991.

It is an arithmetic number, because the mean of its divisors is an integer number (253210716).

Almost surely, 2^1012443431 is an apocalyptic number.

1012443431 is a deficient number, since it is larger than the sum of its proper divisors (399433).

1012443431 is an equidigital number, since it uses as much as digits as its factorization.

1012443431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 399432.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 1012443431 is about 31818.9162449006. The cubic root of 1012443431 is about 1004.1307239589.

Adding to 1012443431 its reverse (1343442101), we get a palindrome (2355885532).

The spelling of 1012443431 in words is "one billion, twelve million, four hundred forty-three thousand, four hundred thirty-one".