43373431 has 4 divisors (see below), whose sum is σ = 43395664. Its totient is φ = 43351200.

The previous prime is 43373419. The next prime is 43373459. The reversal of 43373431 is 13437334.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13437334 = 2 ⋅6718667.

It is a cyclic number.

It is not a de Polignac number, because 43373431 - 2⁵ = 43373399 is a prime.

It is a super-2 number, since 2×43373431² = 3762509033423522, 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 43373431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43373401) 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, 7875 + ... + 12196.

It is an arithmetic number, because the mean of its divisors is an integer number (10848916).

Almost surely, 2^43373431 is an apocalyptic number.

43373431 is a deficient number, since it is larger than the sum of its proper divisors (22233).

43373431 is a wasteful number, since it uses less digits than its factorization.

43373431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22232.

The product of its digits is 9072, while the sum is 28.

The square root of 43373431 is about 6585.8508182315. The cubic root of 43373431 is about 351.3510528513.

The spelling of 43373431 in words is "forty-three million, three hundred seventy-three thousand, four hundred thirty-one".