40112531 has 4 divisors (see below), whose sum is σ = 40189752. Its totient is φ = 40035312.

The previous prime is 40112521. The next prime is 40112533. The reversal of 40112531 is 13521104.

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 40112531 - 2¹⁰ = 40111507 is a prime.

It is a super-2 number, since 2×40112531² = 3218030286451922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40112533) 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, 37826 + ... + 38871.

It is an arithmetic number, because the mean of its divisors is an integer number (10047438).

Almost surely, 2^40112531 is an apocalyptic number.

40112531 is a deficient number, since it is larger than the sum of its proper divisors (77221).

40112531 is an equidigital number, since it uses as much as digits as its factorization.

40112531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77220.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 40112531 is about 6333.4454288326. The cubic root of 40112531 is about 342.3155978959.

Adding to 40112531 its reverse (13521104), we get a palindrome (53633635).

The spelling of 40112531 in words is "forty million, one hundred twelve thousand, five hundred thirty-one".