40350431 has 4 divisors (see below), whose sum is σ = 44018664. Its totient is φ = 36682200.

The previous prime is 40350403. The next prime is 40350491. The reversal of 40350431 is 13405304.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40350431 is a prime.

It is a super-2 number, since 2×40350431² = 3256314563771522, 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 (40350491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1834100 + ... + 1834121.

It is an arithmetic number, because the mean of its divisors is an integer number (11004666).

Almost surely, 2^40350431 is an apocalyptic number.

40350431 is a deficient number, since it is larger than the sum of its proper divisors (3668233).

40350431 is a wasteful number, since it uses less digits than its factorization.

40350431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3668232.

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 40350431 is about 6352.1989106136. The cubic root of 40350431 is about 342.9910012457.

Adding to 40350431 its reverse (13405304), we get a palindrome (53755735).

The spelling of 40350431 in words is "forty million, three hundred fifty thousand, four hundred thirty-one".