215612052 has 12 divisors (see below), whose sum is σ = 503094816. Its totient is φ = 71870680.

The previous prime is 215612027. The next prime is 215612053. The reversal of 215612052 is 250216512.

It is a happy number.

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 (215612053) 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, 8983824 + ... + 8983847.

It is an arithmetic number, because the mean of its divisors is an integer number (41924568).

Almost surely, 2^215612052 is an apocalyptic number.

It is an amenable number.

215612052 is an abundant number, since it is smaller than the sum of its proper divisors (287482764).

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

215612052 is a wasteful number, since it uses less digits than its factorization.

215612052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17967678 (or 17967676 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 24.

The square root of 215612052 is about 14683.7342661872. The cubic root of 215612052 is about 599.6405736197.

Adding to 215612052 its reverse (250216512), we get a palindrome (465828564).

The spelling of 215612052 in words is "two hundred fifteen million, six hundred twelve thousand, fifty-two".