215102550 has 96 divisors (see below), whose sum is σ = 586962432. Its totient is φ = 51799680.

The previous prime is 215102549. The next prime is 215102557. The reversal of 215102550 is 55201512.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215102557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 90477 + ... + 92823.

It is an arithmetic number, because the mean of its divisors is an integer number (6114192).

Almost surely, 2^215102550 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 215102550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (293481216).

215102550 is an abundant number, since it is smaller than the sum of its proper divisors (371859882).

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

215102550 is a wasteful number, since it uses less digits than its factorization.

215102550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2422 (or 2417 counting only the distinct ones).

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

The square root of 215102550 is about 14666.3748077021. The cubic root of 215102550 is about 599.1678742559.

The spelling of 215102550 in words is "two hundred fifteen million, one hundred two thousand, five hundred fifty".