40151212 has 24 divisors (see below), whose sum is σ = 74644416. Its totient is φ = 18832128.

The previous prime is 40151203. The next prime is 40151213. The reversal of 40151212 is 21215104.

It is a super-2 number, since 2×40151212² = 3224239650137888, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (40151213) 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 7 ways as a sum of consecutive naturals, for example, 24573 + ... + 26155.

It is an arithmetic number, because the mean of its divisors is an integer number (3110184).

Almost surely, 2^40151212 is an apocalyptic number.

It is an amenable number.

40151212 is a deficient number, since it is larger than the sum of its proper divisors (34493204).

40151212 is a wasteful number, since it uses less digits than its factorization.

40151212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1977 (or 1975 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 16.

The square root of 40151212 is about 6336.4984021145. The cubic root of 40151212 is about 342.4255955733.

Adding to 40151212 its reverse (21215104), we get a palindrome (61366316).

The spelling of 40151212 in words is "forty million, one hundred fifty-one thousand, two hundred twelve".