40140531 has 12 divisors (see below), whose sum is σ = 58556160. Its totient is φ = 26494800.

The previous prime is 40140511. The next prime is 40140539. The reversal of 40140531 is 13504104.

It is a happy number.

It is not a de Polignac number, because 40140531 - 2⁷ = 40140403 is a prime.

It is a super-2 number, since 2×40140531² = 3222524457923922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40140539) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21171 + ... + 22988.

It is an arithmetic number, because the mean of its divisors is an integer number (4879680).

Almost surely, 2^40140531 is an apocalyptic number.

40140531 is a deficient number, since it is larger than the sum of its proper divisors (18415629).

40140531 is a wasteful number, since it uses less digits than its factorization.

40140531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44266 (or 44263 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 40140531 is about 6335.6555304088. The cubic root of 40140531 is about 342.3952289337.

Adding to 40140531 its reverse (13504104), we get a palindrome (53644635).

The spelling of 40140531 in words is "forty million, one hundred forty thousand, five hundred thirty-one".