215450021050 has 48 divisors (see below), whose sum is σ = 462883444992. Its totient is φ = 73736902400.

The previous prime is 215450021041. The next prime is 215450021071. The reversal of 215450021050 is 50120054512.

215450021050 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 (25).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11512042 + ... + 11530741.

It is an arithmetic number, because the mean of its divisors is an integer number (9643405104).

Almost surely, 2^215450021050 is an apocalyptic number.

215450021050 is an abundant number, since it is smaller than the sum of its proper divisors (247433423942).

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

215450021050 is a wasteful number, since it uses less digits than its factorization.

215450021050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23042823 (or 23042818 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 25.

Adding to 215450021050 its reverse (50120054512), we get a palindrome (265570075562).

The spelling of 215450021050 in words is "two hundred fifteen billion, four hundred fifty million, twenty-one thousand, fifty".