215555412 has 48 divisors (see below), whose sum is σ = 510515712. Its totient is φ = 70780800.

The previous prime is 215555411. The next prime is 215555423. The reversal of 215555412 is 214555512.

215555412 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 215555412.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215555411) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 354813 + ... + 355419.

It is an arithmetic number, because the mean of its divisors is an integer number (10635744).

Almost surely, 2^215555412 is an apocalyptic number.

It is an amenable number.

215555412 is an abundant number, since it is smaller than the sum of its proper divisors (294960300).

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

215555412 is a wasteful number, since it uses less digits than its factorization.

215555412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1008 (or 1006 counting only the distinct ones).

The product of its digits is 10000, while the sum is 30.

The square root of 215555412 is about 14681.8054748045. The cubic root of 215555412 is about 599.5880616872.

The spelling of 215555412 in words is "two hundred fifteen million, five hundred fifty-five thousand, four hundred twelve".