40431353 has 4 divisors (see below), whose sum is σ = 40445328. Its totient is φ = 40417380.

The previous prime is 40431337. The next prime is 40431359. The reversal of 40431353 is 35313404.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 40431353 - 2⁴ = 40431337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40431359) 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, 851 + ... + 9032.

It is an arithmetic number, because the mean of its divisors is an integer number (10111332).

Almost surely, 2^40431353 is an apocalyptic number.

It is an amenable number.

40431353 is a deficient number, since it is larger than the sum of its proper divisors (13975).

40431353 is an equidigital number, since it uses as much as digits as its factorization.

40431353 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13974.

The product of its (nonzero) digits is 2160, while the sum is 23.

The square root of 40431353 is about 6358.5653256061. The cubic root of 40431353 is about 343.2201353869.

Adding to 40431353 its reverse (35313404), we get a palindrome (75744757).

The spelling of 40431353 in words is "forty million, four hundred thirty-one thousand, three hundred fifty-three".