40131539 has 12 divisors (see below), whose sum is σ = 46823904. Its totient is φ = 34295184.

The previous prime is 40131529. The next prime is 40131541. The reversal of 40131539 is 93513104.

It is not a de Polignac number, because 40131539 - 2⁴ = 40131523 is a prime.

It is a super-2 number, since 2×40131539² = 3221080845017042, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40131529) 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, 18422 + ... + 20484.

It is an arithmetic number, because the mean of its divisors is an integer number (3901992).

Almost surely, 2^40131539 is an apocalyptic number.

40131539 is a gapful number since it is divisible by the number (49) formed by its first and last digit.

40131539 is a deficient number, since it is larger than the sum of its proper divisors (6692365).

40131539 is a wasteful number, since it uses less digits than its factorization.

40131539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2474 (or 2467 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 26.

The square root of 40131539 is about 6334.9458561222. The cubic root of 40131539 is about 342.3696600324.

The spelling of 40131539 in words is "forty million, one hundred thirty-one thousand, five hundred thirty-nine".