43831190881 has 3 divisors (see below), whose sum is σ = 43831400241. Its totient is φ = 43830981522.

The previous prime is 43831190869. The next prime is 43831190891. The reversal of 43831190881 is 18809113834.

It is a happy number.

The square root of 43831190881 is 209359.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 43831190881 - 2⁹ = 43831190369 is a prime.

It is a super-2 number, since 2×43831190881² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43831190891) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 104680 + ... + 314038.

It is an arithmetic number, because the mean of its divisors is an integer number (14610466747).

Almost surely, 2^43831190881 is an apocalyptic number.

43831190881 is the 209359-th square number.

43831190881 is the 104680-th centered octagonal number.

It is an amenable number.

43831190881 is a deficient number, since it is larger than the sum of its proper divisors (209360).

43831190881 is an frugal number, since it uses more digits than its factorization.

43831190881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 418718 (or 209359 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 46.

The spelling of 43831190881 in words is "forty-three billion, eight hundred thirty-one million, one hundred ninety thousand, eight hundred eighty-one".