40819231 has 4 divisors (see below), whose sum is σ = 41814864. Its totient is φ = 39823600.

The previous prime is 40819217. The next prime is 40819237. The reversal of 40819231 is 13291804.

It is a happy number.

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 40819231 - 2⁵ = 40819199 is a prime.

It is a super-2 number, since 2×40819231² = 3332419238862722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 40819231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40819237) 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, 497755 + ... + 497836.

It is an arithmetic number, because the mean of its divisors is an integer number (10453716).

Almost surely, 2^40819231 is an apocalyptic number.

40819231 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

40819231 is a deficient number, since it is larger than the sum of its proper divisors (995633).

40819231 is an equidigital number, since it uses as much as digits as its factorization.

40819231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 995632.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 40819231 is about 6388.9929566403. The cubic root of 40819231 is about 344.3142044274.

The spelling of 40819231 in words is "forty million, eight hundred nineteen thousand, two hundred thirty-one".