215141634450 has 108 divisors (see below), whose sum is σ = 598633716798. Its totient is φ = 55392691200.

The previous prime is 215141634439. The next prime is 215141634469. The reversal of 215141634450 is 54436141512.

215141634450 is a `hidden beast` number, since 2 + 1 + 5 + 14 + 1 + 634 + 4 + 5 + 0 = 666.

It can be written as a sum of positive squares in 9 ways, for example, as 51900585489 + 163241048961 = 227817^2 + 404031^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 53 ways as a sum of consecutive naturals, for example, 94210 + ... + 662690.

Almost surely, 2^215141634450 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 215141634450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (299316858399).

215141634450 is an abundant number, since it is smaller than the sum of its proper divisors (383492082348).

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

215141634450 is a wasteful number, since it uses less digits than its factorization.

215141634450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 568557 (or 568520 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 36.

Adding to 215141634450 its reverse (54436141512), we get a palindrome (269577775962).

The spelling of 215141634450 in words is "two hundred fifteen billion, one hundred forty-one million, six hundred thirty-four thousand, four hundred fifty".