40311212 has 6 divisors (see below), whose sum is σ = 70544628. Its totient is φ = 20155604.

The previous prime is 40311211. The next prime is 40311239. The reversal of 40311212 is 21211304.

40311212 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (40311211) 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 as a sum of consecutive naturals, namely, 5038898 + ... + 5038905.

It is an arithmetic number, because the mean of its divisors is an integer number (11757438).

Almost surely, 2^40311212 is an apocalyptic number.

It is an amenable number.

40311212 is a deficient number, since it is larger than the sum of its proper divisors (30233416).

40311212 is a wasteful number, since it uses less digits than its factorization.

40311212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10077807 (or 10077805 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 40311212 is about 6349.1111188890. Note that the first 5 decimals coincide. The cubic root of 40311212 is about 342.8798407262.

Adding to 40311212 its reverse (21211304), we get a palindrome (61522516).

The spelling of 40311212 in words is "forty million, three hundred eleven thousand, two hundred twelve".