43085731 has 8 divisors (see below), whose sum is σ = 46988480. Its totient is φ = 39267072.

The previous prime is 43085717. The next prime is 43085743. The reversal of 43085731 is 13758034.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 43085731 - 2²¹ = 40988579 is a prime.

It is a super-2 number, since 2×43085731² = 3712760431608722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 43085693 and 43085702.

It is not an unprimeable number, because it can be changed into a prime (43085771) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19950 + ... + 22003.

It is an arithmetic number, because the mean of its divisors is an integer number (5873560).

Almost surely, 2^43085731 is an apocalyptic number.

43085731 is a deficient number, since it is larger than the sum of its proper divisors (3902749).

43085731 is a wasteful number, since it uses less digits than its factorization.

43085731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42045.

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 43085731 is about 6563.9721967723. The cubic root of 43085731 is about 350.5724807929.

The spelling of 43085731 in words is "forty-three million, eighty-five thousand, seven hundred thirty-one".