40731212 has 12 divisors (see below), whose sum is σ = 75031320. Its totient is φ = 19293696.

The previous prime is 40731211. The next prime is 40731217. The reversal of 40731212 is 21213704.

It is not an unprimeable number, because it can be changed into a prime (40731211) 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, 267893 + ... + 268044.

It is an arithmetic number, because the mean of its divisors is an integer number (6252610).

Almost surely, 2^40731212 is an apocalyptic number.

It is an amenable number.

40731212 is a deficient number, since it is larger than the sum of its proper divisors (34300108).

40731212 is a wasteful number, since it uses less digits than its factorization.

40731212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 535960 (or 535958 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 20.

The square root of 40731212 is about 6382.1009080083. The cubic root of 40731212 is about 344.0665433736.

Adding to 40731212 its reverse (21213704), we get a palindrome (61944916).

The spelling of 40731212 in words is "forty million, seven hundred thirty-one thousand, two hundred twelve".