215826012 has 48 divisors (see below), whose sum is σ = 569049600. Its totient is φ = 70720560.

The previous prime is 215826011. The next prime is 215826031. The reversal of 215826012 is 210628512.

It is a happy number.

215826012 is a `hidden beast` number, since 2 + 1 + 58 + 2 + 601 + 2 = 666.

It is a super-3 number, since 3×215826012³ (a number of 26 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215826011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10564 + ... + 23307.

It is an arithmetic number, because the mean of its divisors is an integer number (11855200).

Almost surely, 2^215826012 is an apocalyptic number.

It is an amenable number.

215826012 is an abundant number, since it is smaller than the sum of its proper divisors (353223588).

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

215826012 is a wasteful number, since it uses less digits than its factorization.

215826012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33943 (or 33935 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 215826012 is about 14691.0180722780. The cubic root of 215826012 is about 599.8388567253.

The spelling of 215826012 in words is "two hundred fifteen million, eight hundred twenty-six thousand, twelve".