40135819 has 4 divisors (see below), whose sum is σ = 40173120. Its totient is φ = 40098520.

The previous prime is 40135817. The next prime is 40135831. The reversal of 40135819 is 91853104.

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 40135819 - 2¹ = 40135817 is a prime.

It is a super-2 number, since 2×40135819² = 3221767933601522, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40135811) 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, 16987 + ... + 19204.

It is an arithmetic number, because the mean of its divisors is an integer number (10043280).

Almost surely, 2^40135819 is an apocalyptic number.

40135819 is a deficient number, since it is larger than the sum of its proper divisors (37301).

40135819 is a wasteful number, since it uses less digits than its factorization.

40135819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37300.

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 40135819 is about 6335.2836558437. The cubic root of 40135819 is about 342.3818307597.

The spelling of 40135819 in words is "forty million, one hundred thirty-five thousand, eight hundred nineteen".