215001450 has 108 divisors (see below), whose sum is σ = 595372050. Its totient is φ = 55624320.

The previous prime is 215001407. The next prime is 215001463. The reversal of 215001450 is 54100512.

215001450 is a `hidden beast` number, since 21 + 500 + 145 + 0 = 666.

It can be written as a sum of positive squares in 9 ways, for example, as 116575209 + 98426241 = 10797^2 + 9921^2 .

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

It is an unprimeable number.

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 53 ways as a sum of consecutive naturals, for example, 615876 + ... + 616224.

Almost surely, 2^215001450 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 215001450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (297686025).

215001450 is an abundant number, since it is smaller than the sum of its proper divisors (380370600).

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

215001450 is a wasteful number, since it uses less digits than its factorization.

215001450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 441 (or 396 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 18.

The square root of 215001450 is about 14662.9277431214. The cubic root of 215001450 is about 599.0739882389.

Adding to 215001450 its reverse (54100512), we get a palindrome (269101962).

The spelling of 215001450 in words is "two hundred fifteen million, one thousand, four hundred fifty".