40536431 has 8 divisors (see below), whose sum is σ = 43970640. Its totient is φ = 37147392.

The previous prime is 40536427. The next prime is 40536473. The reversal of 40536431 is 13463504.

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

It is a cyclic number.

It is not a de Polignac number, because 40536431 - 2² = 40536427 is a prime.

It is a super-2 number, since 2×40536431² = 3286404476435522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 40536431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40536421) 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, 9410 + ... + 13023.

It is an arithmetic number, because the mean of its divisors is an integer number (5496330).

Almost surely, 2^40536431 is an apocalyptic number.

40536431 is a deficient number, since it is larger than the sum of its proper divisors (3434209).

40536431 is a wasteful number, since it uses less digits than its factorization.

40536431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22585.

The product of its (nonzero) digits is 4320, while the sum is 26.

The square root of 40536431 is about 6366.8226769716. The cubic root of 40536431 is about 343.5172124855.

Adding to 40536431 its reverse (13463504), we get a palindrome (53999935).

The spelling of 40536431 in words is "forty million, five hundred thirty-six thousand, four hundred thirty-one".