40718031 has 4 divisors (see below), whose sum is σ = 54290712. Its totient is φ = 27145352.

The previous prime is 40718023. The next prime is 40718047. The reversal of 40718031 is 13081704.

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 40718031 - 2³ = 40718023 is a prime.

It is a super-2 number, since 2×40718031² = 3315916097033922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 40717992 and 40718010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40718071) 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, 6786336 + ... + 6786341.

It is an arithmetic number, because the mean of its divisors is an integer number (13572678).

Almost surely, 2^40718031 is an apocalyptic number.

40718031 is a deficient number, since it is larger than the sum of its proper divisors (13572681).

40718031 is a wasteful number, since it uses less digits than its factorization.

40718031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13572680.

The product of its (nonzero) digits is 672, while the sum is 24.

The square root of 40718031 is about 6381.0681707689. The cubic root of 40718031 is about 344.0294249888.

Adding to 40718031 its reverse (13081704), we get a palindrome (53799735).

The spelling of 40718031 in words is "forty million, seven hundred eighteen thousand, thirty-one".