40231405 has 4 divisors (see below), whose sum is σ = 48277692. Its totient is φ = 32185120.

The previous prime is 40231363. The next prime is 40231409. The reversal of 40231405 is 50413204.

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 26071236 + 14160169 = 5106^2 + 3763^2 .

It is not a de Polignac number, because 40231405 - 2⁹ = 40230893 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40231409) 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, 4023136 + ... + 4023145.

It is an arithmetic number, because the mean of its divisors is an integer number (12069423).

Almost surely, 2^40231405 is an apocalyptic number.

It is an amenable number.

40231405 is a deficient number, since it is larger than the sum of its proper divisors (8046287).

40231405 is an equidigital number, since it uses as much as digits as its factorization.

40231405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8046286.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 40231405 is about 6342.8231096256. The cubic root of 40231405 is about 342.6534166266.

Adding to 40231405 its reverse (50413204), we get a palindrome (90644609).

The spelling of 40231405 in words is "forty million, two hundred thirty-one thousand, four hundred five".