215105052 has 12 divisors (see below), whose sum is σ = 501911816. Its totient is φ = 71701680.

The previous prime is 215104987. The next prime is 215105057. The reversal of 215105052 is 250501512.

215105052 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215105057) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8962699 + ... + 8962722.

Almost surely, 2^215105052 is an apocalyptic number.

It is an amenable number.

215105052 is an abundant number, since it is smaller than the sum of its proper divisors (286806764).

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

215105052 is a wasteful number, since it uses less digits than its factorization.

215105052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17925428 (or 17925426 counting only the distinct ones).

The product of its (nonzero) digits is 500, while the sum is 21.

The square root of 215105052 is about 14666.4601046060. The cubic root of 215105052 is about 599.1701973528.

Adding to 215105052 its reverse (250501512), we get a palindrome (465606564).

It can be divided in two parts, 21510 and 5052, that added together give a palindrome (26562).

The spelling of 215105052 in words is "two hundred fifteen million, one hundred five thousand, fifty-two".