215116550 has 48 divisors (see below), whose sum is σ = 438668352. Its totient is φ = 77834400.

The previous prime is 215116549. The next prime is 215116553. The reversal of 215116550 is 55611512.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215116553) 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 23 ways as a sum of consecutive naturals, for example, 123989 + ... + 125711.

It is an arithmetic number, because the mean of its divisors is an integer number (9138924).

Almost surely, 2^215116550 is an apocalyptic number.

215116550 is an abundant number, since it is smaller than the sum of its proper divisors (223551802).

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

215116550 is a wasteful number, since it uses less digits than its factorization.

215116550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1973 (or 1968 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 26.

The square root of 215116550 is about 14666.8520821613. The cubic root of 215116550 is about 599.1808729678.

The spelling of 215116550 in words is "two hundred fifteen million, one hundred sixteen thousand, five hundred fifty".