40012331 has 4 divisors (see below), whose sum is σ = 40062600. Its totient is φ = 39962064.

The previous prime is 40012321. The next prime is 40012361. The reversal of 40012331 is 13321004.

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 40012331 - 2⁶ = 40012267 is a prime.

It is a super-2 number, since 2×40012331² = 3201973264107122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40012321) 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 3 ways as a sum of consecutive naturals, for example, 23921 + ... + 25538.

It is an arithmetic number, because the mean of its divisors is an integer number (10015650).

Almost surely, 2^40012331 is an apocalyptic number.

40012331 is a deficient number, since it is larger than the sum of its proper divisors (50269).

40012331 is an equidigital number, since it uses as much as digits as its factorization.

40012331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50268.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 40012331 is about 6325.5300963635. The cubic root of 40012331 is about 342.0303285804.

Adding to 40012331 its reverse (13321004), we get a palindrome (53333335).

The spelling of 40012331 in words is "forty million, twelve thousand, three hundred thirty-one".