40125531 has 16 divisors (see below), whose sum is σ = 55560960. Its totient is φ = 25727520.

The previous prime is 40125521. The next prime is 40125539. The reversal of 40125531 is 13552104.

It is not a de Polignac number, because 40125531 - 2⁷ = 40125403 is a prime.

It is a super-2 number, since 2×40125531² = 3220116476063922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 40125498 and 40125507.

It is not an unprimeable number, because it can be changed into a prime (40125539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26316 + ... + 27798.

It is an arithmetic number, because the mean of its divisors is an integer number (3472560).

Almost surely, 2^40125531 is an apocalyptic number.

40125531 is a deficient number, since it is larger than the sum of its proper divisors (15435429).

40125531 is a wasteful number, since it uses less digits than its factorization.

40125531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1826.

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

The square root of 40125531 is about 6334.4716433180. The cubic root of 40125531 is about 342.3525740561.

Adding to 40125531 its reverse (13552104), we get a palindrome (53677635).

The spelling of 40125531 in words is "forty million, one hundred twenty-five thousand, five hundred thirty-one".