40131525 has 24 divisors (see below), whose sum is σ = 75830464. Its totient is φ = 18345600.

The previous prime is 40131523. The next prime is 40131529. The reversal of 40131525 is 52513104.

40131525 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 40131525 - 2¹ = 40131523 is a prime.

It is a super-2 number, since 2×40131525² = 3221078597651250, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40131523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 37696 + ... + 38745.

Almost surely, 2^40131525 is an apocalyptic number.

It is an amenable number.

40131525 is a deficient number, since it is larger than the sum of its proper divisors (35698939).

40131525 is a wasteful number, since it uses less digits than its factorization.

40131525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76461 (or 76456 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 40131525 is about 6334.9447511403. The cubic root of 40131525 is about 342.3696202202.

Adding to 40131525 its reverse (52513104), we get a palindrome (92644629).

The spelling of 40131525 in words is "forty million, one hundred thirty-one thousand, five hundred twenty-five".