40124431 has 4 divisors (see below), whose sum is σ = 40162432. Its totient is φ = 40086432.

The previous prime is 40124419. The next prime is 40124449. The reversal of 40124431 is 13442104.

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 40124431 - 2⁷ = 40124303 is a prime.

It is a super-2 number, since 2×40124431² = 3219939926147522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40124399 and 40124408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40124401) 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, 17370 + ... + 19543.

It is an arithmetic number, because the mean of its divisors is an integer number (10040608).

Almost surely, 2^40124431 is an apocalyptic number.

40124431 is a deficient number, since it is larger than the sum of its proper divisors (38001).

40124431 is a wasteful number, since it uses less digits than its factorization.

40124431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38000.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 40124431 is about 6334.3848162233. The cubic root of 40124431 is about 342.3494456134.

Adding to 40124431 its reverse (13442104), we get a palindrome (53566535).

The spelling of 40124431 in words is "forty million, one hundred twenty-four thousand, four hundred thirty-one".