40113431 has 4 divisors (see below), whose sum is σ = 40158000. Its totient is φ = 40068864.

The previous prime is 40113413. The next prime is 40113461. The reversal of 40113431 is 13431104.

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 40113431 - 2¹⁰ = 40112407 is a prime.

It is a super-2 number, since 2×40113431² = 3218174693183522, 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 (40113461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20906 + ... + 22743.

It is an arithmetic number, because the mean of its divisors is an integer number (10039500).

Almost surely, 2^40113431 is an apocalyptic number.

40113431 is a deficient number, since it is larger than the sum of its proper divisors (44569).

40113431 is an equidigital number, since it uses as much as digits as its factorization.

40113431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44568.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 40113431 is about 6333.5164798080. The cubic root of 40113431 is about 342.3181580413.

Adding to 40113431 its reverse (13431104), we get a palindrome (53544535).

The spelling of 40113431 in words is "forty million, one hundred thirteen thousand, four hundred thirty-one".