43373881 has 4 divisors (see below), whose sum is σ = 43515472. Its totient is φ = 43232292.

The previous prime is 43373861. The next prime is 43373887. The reversal of 43373881 is 18837334.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 18837334 = 2 ⋅9418667.

It is a cyclic number.

It is not a de Polignac number, because 43373881 - 2¹⁵ = 43341113 is a prime.

It is a super-2 number, since 2×43373881² = 3762587106004322, 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 43373881.

It is not an unprimeable number, because it can be changed into a prime (43373887) 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, 70335 + ... + 70948.

It is an arithmetic number, because the mean of its divisors is an integer number (10878868).

Almost surely, 2^43373881 is an apocalyptic number.

It is an amenable number.

43373881 is a deficient number, since it is larger than the sum of its proper divisors (141591).

43373881 is a wasteful number, since it uses less digits than its factorization.

43373881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141590.

The product of its digits is 48384, while the sum is 37.

The square root of 43373881 is about 6585.8849822936. The cubic root of 43373881 is about 351.3522679380.

The spelling of 43373881 in words is "forty-three million, three hundred seventy-three thousand, eight hundred eighty-one".