215117448 has 96 divisors (see below), whose sum is σ = 673767360. Its totient is φ = 56730240.

The previous prime is 215117443. The next prime is 215117453. The reversal of 215117448 is 844711512.

It is an interprime number because it is at equal distance from previous prime (215117443) and next prime (215117453).

It is not an unprimeable number, because it can be changed into a prime (215117443) 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 23 ways as a sum of consecutive naturals, for example, 8253 + ... + 22323.

It is an arithmetic number, because the mean of its divisors is an integer number (7018410).

Almost surely, 2^215117448 is an apocalyptic number.

215117448 is a gapful number since it is divisible by the number (28) 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 215117448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (336883680).

215117448 is an abundant number, since it is smaller than the sum of its proper divisors (458649912).

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

215117448 is a wasteful number, since it uses less digits than its factorization.

215117448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14107 (or 14096 counting only the distinct ones).

The product of its digits is 8960, while the sum is 33.

The square root of 215117448 is about 14666.8826953787. The cubic root of 215117448 is about 599.1817067231.

The spelling of 215117448 in words is "two hundred fifteen million, one hundred seventeen thousand, four hundred forty-eight".