40131031 has 4 divisors (see below), whose sum is σ = 40190472. Its totient is φ = 40071592.

The previous prime is 40131029. The next prime is 40131043. The reversal of 40131031 is 13013104.

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 40131031 - 2¹ = 40131029 is a prime.

It is a super-3 number, since 3×40131031³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40131011) 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, 28696 + ... + 30061.

It is an arithmetic number, because the mean of its divisors is an integer number (10047618).

Almost surely, 2^40131031 is an apocalyptic number.

40131031 is a deficient number, since it is larger than the sum of its proper divisors (59441).

40131031 is an equidigital number, since it uses as much as digits as its factorization.

40131031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59440.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 40131031 is about 6334.9057609407. The cubic root of 40131031 is about 342.3682154120.

Adding to 40131031 its reverse (13013104), we get a palindrome (53144135).

It can be divided in two parts, 4013103 and 1, that added together give a palindrome (4013104).

The spelling of 40131031 in words is "forty million, one hundred thirty-one thousand, thirty-one".