215450000 has 120 divisors (see below), whose sum is σ = 542465280. Its totient is φ = 82800000.

The previous prime is 215449999. The next prime is 215450003. The reversal of 215450000 is 54512.

It is not an unprimeable number, because it can be changed into a prime (215450003) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1549931 + ... + 1550069.

It is an arithmetic number, because the mean of its divisors is an integer number (4520544).

Almost surely, 2^215450000 is an apocalyptic number.

215450000 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 215450000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (271232640).

215450000 is an abundant number, since it is smaller than the sum of its proper divisors (327015280).

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

215450000 is an equidigital number, since it uses as much as digits as its factorization.

215450000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203 (or 177 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 17.

The square root of 215450000 is about 14678.2151503512. The cubic root of 215450000 is about 599.4903078866.

The spelling of 215450000 in words is "two hundred fifteen million, four hundred fifty thousand".