40212512 has 54 divisors (see below), whose sum is σ = 84994623. Its totient is φ = 18725184.

The previous prime is 40212511. The next prime is 40212521. The reversal of 40212512 is 21521204.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in only one way, i.e., 20106256 + 20106256 = 4484^2 + 4484^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=4484.

It is a super-2 number, since 2×40212512² = 3234092242700288, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40212511) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 681539 + ... + 681597.

Almost surely, 2^40212512 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40212512

40212512 is an abundant number, since it is smaller than the sum of its proper divisors (44782111).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40212512 is an equidigital number, since it uses as much as digits as its factorization.

40212512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166 (or 80 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 40212512 is about 6341.3336136810. Note that the first 3 decimals coincide. The cubic root of 40212512 is about 342.5997706036.

Adding to 40212512 its reverse (21521204), we get a palindrome (61733716).

The spelling of 40212512 in words is "forty million, two hundred twelve thousand, five hundred twelve".