43494431 has 4 divisors (see below), whose sum is σ = 43761432. Its totient is φ = 43227432.

The previous prime is 43494427. The next prime is 43494463. The reversal of 43494431 is 13449434.

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 43494431 - 2² = 43494427 is a prime.

It is a super-2 number, since 2×43494431² = 3783531056027522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43494931) 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, 133256 + ... + 133581.

It is an arithmetic number, because the mean of its divisors is an integer number (10940358).

Almost surely, 2^43494431 is an apocalyptic number.

43494431 is a deficient number, since it is larger than the sum of its proper divisors (267001).

43494431 is a wasteful number, since it uses less digits than its factorization.

43494431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 267000.

The product of its digits is 20736, while the sum is 32.

The square root of 43494431 is about 6595.0307808228. The cubic root of 43494431 is about 351.6774739185.

The spelling of 43494431 in words is "forty-three million, four hundred ninety-four thousand, four hundred thirty-one".