40140031 has 4 divisors (see below), whose sum is σ = 41524200. Its totient is φ = 38755864.

The previous prime is 40140019. The next prime is 40140047. The reversal of 40140031 is 13004104.

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 40140031 - 2¹¹ = 40137983 is a prime.

It is a super-2 number, since 2×40140031² = 3222444177361922, 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 = 40139993 and 40140020.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40140011) 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, 692041 + ... + 692098.

It is an arithmetic number, because the mean of its divisors is an integer number (10381050).

Almost surely, 2^40140031 is an apocalyptic number.

40140031 is a deficient number, since it is larger than the sum of its proper divisors (1384169).

40140031 is a wasteful number, since it uses less digits than its factorization.

40140031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1384168.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 40140031 is about 6335.6160710700. The cubic root of 40140031 is about 342.3938072757.

Adding to 40140031 its reverse (13004104), we get a palindrome (53144135).

The spelling of 40140031 in words is "forty million, one hundred forty thousand, thirty-one".