40043519 has 4 divisors (see below), whose sum is σ = 41424360. Its totient is φ = 38662680.

The previous prime is 40043489. The next prime is 40043527. The reversal of 40043519 is 91534004.

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

It is a cyclic number.

It is not a de Polignac number, because 40043519 - 2¹² = 40039423 is a prime.

It is a super-2 number, since 2×40043519² = 3206966827806722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40043569) 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, 690377 + ... + 690434.

It is an arithmetic number, because the mean of its divisors is an integer number (10356090).

Almost surely, 2^40043519 is an apocalyptic number.

40043519 is a deficient number, since it is larger than the sum of its proper divisors (1380841).

40043519 is a wasteful number, since it uses less digits than its factorization.

40043519 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1380840.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 40043519 is about 6327.9948640940. The cubic root of 40043519 is about 342.1191717883.

The spelling of 40043519 in words is "forty million, forty-three thousand, five hundred nineteen".