43381971903 has 4 divisors (see below), whose sum is σ = 57842629208. Its totient is φ = 28921314600.

The previous prime is 43381971739. The next prime is 43381971907. The reversal of 43381971903 is 30917918334.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 43381971903 - 2¹⁸ = 43381709759 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 (43381971907) 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, 7230328648 + ... + 7230328653.

It is an arithmetic number, because the mean of its divisors is an integer number (14460657302).

Almost surely, 2^43381971903 is an apocalyptic number.

43381971903 is a deficient number, since it is larger than the sum of its proper divisors (14460657305).

43381971903 is a wasteful number, since it uses less digits than its factorization.

43381971903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14460657304.

The product of its (nonzero) digits is 489888, while the sum is 48.

The spelling of 43381971903 in words is "forty-three billion, three hundred eighty-one million, nine hundred seventy-one thousand, nine hundred three".