40235431 has 4 divisors (see below), whose sum is σ = 41091552. Its totient is φ = 39379312.

The previous prime is 40235399. The next prime is 40235449. The reversal of 40235431 is 13453204.

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 40235431 - 2⁵ = 40235399 is a prime.

It is a super-2 number, since 2×40235431² = 3237779815511522, 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 (40235491) 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, 427990 + ... + 428083.

It is an arithmetic number, because the mean of its divisors is an integer number (10272888).

Almost surely, 2^40235431 is an apocalyptic number.

40235431 is a deficient number, since it is larger than the sum of its proper divisors (856121).

40235431 is an equidigital number, since it uses as much as digits as its factorization.

40235431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 856120.

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 40235431 is about 6343.1404682539. The cubic root of 40235431 is about 342.6648461441.

Adding to 40235431 its reverse (13453204), we get a palindrome (53688635).

The spelling of 40235431 in words is "forty million, two hundred thirty-five thousand, four hundred thirty-one".