40512212 has 12 divisors (see below), whose sum is σ = 76350036. Its totient is φ = 18697920.

The previous prime is 40512209. The next prime is 40512229. The reversal of 40512212 is 21221504.

It can be written as a sum of positive squares in 2 ways, for example, as 22905796 + 17606416 = 4786^2 + 4196^2 .

It is a super-2 number, since 2×40512212² = 3282478642265888, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 389489 + ... + 389592.

It is an arithmetic number, because the mean of its divisors is an integer number (6362503).

Almost surely, 2^40512212 is an apocalyptic number.

It is an amenable number.

40512212 is a deficient number, since it is larger than the sum of its proper divisors (35837824).

40512212 is a wasteful number, since it uses less digits than its factorization.

40512212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 779098 (or 779096 counting only the distinct ones).

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

The square root of 40512212 is about 6364.9204236974. The cubic root of 40512212 is about 343.4487859648.

Adding to 40512212 its reverse (21221504), we get a palindrome (61733716).

The spelling of 40512212 in words is "forty million, five hundred twelve thousand, two hundred twelve".