215513116 has 96 divisors (see below), whose sum is σ = 487710720. Its totient is φ = 81043200.

The previous prime is 215513113. The next prime is 215513141. The reversal of 215513116 is 611315512.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215513113) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 801030 + ... + 801298.

It is an arithmetic number, because the mean of its divisors is an integer number (5080320).

Almost surely, 2^215513116 is an apocalyptic number.

215513116 is a gapful number since it is divisible by the number (26) 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 215513116, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (243855360).

215513116 is an abundant number, since it is smaller than the sum of its proper divisors (272197604).

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

215513116 is a wasteful number, since it uses less digits than its factorization.

215513116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 395 (or 393 counting only the distinct ones).

The product of its digits is 900, while the sum is 25.

The square root of 215513116 is about 14680.3649818388. The cubic root of 215513116 is about 599.5488423278.

Adding to 215513116 its reverse (611315512), we get a palindrome (826828628).

The spelling of 215513116 in words is "two hundred fifteen million, five hundred thirteen thousand, one hundred sixteen".