40230431 has 4 divisors (see below), whose sum is σ = 40372872. Its totient is φ = 40087992.

The previous prime is 40230419. The next prime is 40230451. The reversal of 40230431 is 13403204.

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 40230431 - 2⁶ = 40230367 is a prime.

It is a super-2 number, since 2×40230431² = 3236975156891522, 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 (40230451) 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, 70796 + ... + 71361.

It is an arithmetic number, because the mean of its divisors is an integer number (10093218).

Almost surely, 2^40230431 is an apocalyptic number.

40230431 is a deficient number, since it is larger than the sum of its proper divisors (142441).

40230431 is a wasteful number, since it uses less digits than its factorization.

40230431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142440.

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 40230431 is about 6342.7463294696. The cubic root of 40230431 is about 342.6506513978.

Adding to 40230431 its reverse (13403204), we get a palindrome (53633635).

The spelling of 40230431 in words is "forty million, two hundred thirty thousand, four hundred thirty-one".