215534028 has 24 divisors (see below), whose sum is σ = 516506032. Its totient is φ = 69902784.

The previous prime is 215534027. The next prime is 215534029. The reversal of 215534028 is 820435512.

215534028 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (215534027) and next prime (215534029).

It is a junction number, because it is equal to n+sod(n) for n = 215533986 and 215534004.

It is not an unprimeable number, because it can be changed into a prime (215534027) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 242275 + ... + 243162.

Almost surely, 2^215534028 is an apocalyptic number.

It is an amenable number.

215534028 is an abundant number, since it is smaller than the sum of its proper divisors (300972004).

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

215534028 is a wasteful number, since it uses less digits than its factorization.

215534028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 485481 (or 485479 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 30.

The square root of 215534028 is about 14681.0772084340. The cubic root of 215534028 is about 599.5682338156.

The spelling of 215534028 in words is "two hundred fifteen million, five hundred thirty-four thousand, twenty-eight".