215055000 has 280 divisors, whose sum is σ = 768269700. Its totient is φ = 56376000.

The previous prime is 215054999. The next prime is 215055011. The reversal of 215055000 is 550512.

215055000 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 69 ways as a sum of consecutive naturals, for example, 3644971 + ... + 3645029.

Almost surely, 2^215055000 is an apocalyptic number.

215055000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 215055000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (384134850).

215055000 is an abundant number, since it is smaller than the sum of its proper divisors (553214700).

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

215055000 is an frugal number, since it uses more digits than its factorization.

215055000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103 (or 69 counting only the distinct ones).

The product of its (nonzero) digits is 250, while the sum is 18.

The square root of 215055000 is about 14664.7536631203. The cubic root of 215055000 is about 599.1237208478.

The spelling of 215055000 in words is "two hundred fifteen million, fifty-five thousand".