43113881 has 4 divisors (see below), whose sum is σ = 43558452. Its totient is φ = 42669312.

The previous prime is 43113871. The next prime is 43113893. The reversal of 43113881 is 18831134.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8410000 + 34703881 = 2900^2 + 5891^2 .

It is a cyclic number.

It is not a de Polignac number, because 43113881 - 2⁶ = 43113817 is a prime.

It is a super-2 number, since 2×43113881² = 3717613469764322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43113871) 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, 222140 + ... + 222333.

It is an arithmetic number, because the mean of its divisors is an integer number (10889613).

Almost surely, 2^43113881 is an apocalyptic number.

It is an amenable number.

43113881 is a deficient number, since it is larger than the sum of its proper divisors (444571).

43113881 is an equidigital number, since it uses as much as digits as its factorization.

43113881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 444570.

The product of its digits is 2304, while the sum is 29.

The square root of 43113881 is about 6566.1161275140. The cubic root of 43113881 is about 350.6488128459.

It can be divided in two parts, 4311 and 3881, that added together give a 13-th power (8192 = 2¹³).

The spelling of 43113881 in words is "forty-three million, one hundred thirteen thousand, eight hundred eighty-one".