215041212 has 18 divisors (see below), whose sum is σ = 543576488. Its totient is φ = 71680392.

The previous prime is 215041207. The next prime is 215041243. The reversal of 215041212 is 212140512.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

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 in 5 ways as a sum of consecutive naturals, for example, 2986648 + ... + 2986719.

Almost surely, 2^215041212 is an apocalyptic number.

It is an amenable number.

215041212 is an abundant number, since it is smaller than the sum of its proper divisors (328535276).

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

215041212 is a wasteful number, since it uses less digits than its factorization.

215041212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5973377 (or 5973372 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

The square root of 215041212 is about 14664.2835488134. The cubic root of 215041212 is about 599.1109165351.

Adding to 215041212 its reverse (212140512), we get a palindrome (427181724).

The spelling of 215041212 in words is "two hundred fifteen million, forty-one thousand, two hundred twelve".