43087881 has 16 divisors (see below), whose sum is σ = 59765760. Its totient is φ = 27578880.

The previous prime is 43087871. The next prime is 43087897. The reversal of 43087881 is 18878034.

It is not a de Polignac number, because 43087881 - 2⁷ = 43087753 is a prime.

It is a super-2 number, since 2×43087881² = 3713130978140322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (43087831) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15321 + ... + 17913.

It is an arithmetic number, because the mean of its divisors is an integer number (3735360).

Almost surely, 2^43087881 is an apocalyptic number.

It is an amenable number.

43087881 is a deficient number, since it is larger than the sum of its proper divisors (16677879).

43087881 is a wasteful number, since it uses less digits than its factorization.

43087881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2816.

The product of its (nonzero) digits is 43008, while the sum is 39.

The square root of 43087881 is about 6564.1359675132. The cubic root of 43087881 is about 350.5783119446.

The spelling of 43087881 in words is "forty-three million, eighty-seven thousand, eight hundred eighty-one".