215240550 has 96 divisors (see below), whose sum is σ = 642220800. Its totient is φ = 46604160.

The previous prime is 215240449. The next prime is 215240551. The reversal of 215240550 is 55042512.

It is a happy number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 215240550.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215240551) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 14556 + ... + 25344.

It is an arithmetic number, because the mean of its divisors is an integer number (6689800).

Almost surely, 2^215240550 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 215240550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (321110400).

215240550 is an abundant number, since it is smaller than the sum of its proper divisors (426980250).

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

215240550 is a wasteful number, since it uses less digits than its factorization.

215240550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10830 (or 10825 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 24.

The square root of 215240550 is about 14671.0786924479. The cubic root of 215240550 is about 599.2959798046.

The spelling of 215240550 in words is "two hundred fifteen million, two hundred forty thousand, five hundred fifty".