40212231 has 8 divisors (see below), whose sum is σ = 53889264. Its totient is φ = 26671680.

The previous prime is 40212209. The next prime is 40212251. The reversal of 40212231 is 13221204.

40212231 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 40212231 - 2⁶ = 40212167 is a prime.

It is a super-2 number, since 2×40212231² = 3234047043994722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 40212231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40212251) 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 7 ways as a sum of consecutive naturals, for example, 33430 + ... + 34611.

It is an arithmetic number, because the mean of its divisors is an integer number (6736158).

Almost surely, 2^40212231 is an apocalyptic number.

40212231 is a deficient number, since it is larger than the sum of its proper divisors (13677033).

40212231 is a wasteful number, since it uses less digits than its factorization.

40212231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68241.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 40212231 is about 6341.3114574195. The cubic root of 40212231 is about 342.5989725869.

Adding to 40212231 its reverse (13221204), we get a palindrome (53433435).

The spelling of 40212231 in words is "forty million, two hundred twelve thousand, two hundred thirty-one".