40381431 has 8 divisors (see below), whose sum is σ = 53998464. Its totient is φ = 26842680.

The previous prime is 40381423. The next prime is 40381447. The reversal of 40381431 is 13418304.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 40381431 - 2³ = 40381423 is a prime.

It is a super-2 number, since 2×40381431² = 3261319939215522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40381421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18355 + ... + 20436.

It is an arithmetic number, because the mean of its divisors is an integer number (6749808).

Almost surely, 2^40381431 is an apocalyptic number.

40381431 is a deficient number, since it is larger than the sum of its proper divisors (13617033).

40381431 is a wasteful number, since it uses less digits than its factorization.

40381431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39141.

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 40381431 is about 6354.6385420416. The cubic root of 40381431 is about 343.0788152542.

Adding to 40381431 its reverse (13418304), we get a palindrome (53799735).

The spelling of 40381431 in words is "forty million, three hundred eighty-one thousand, four hundred thirty-one".