215114240 has 80 divisors (see below), whose sum is σ = 562731840. Its totient is φ = 78213120.

The previous prime is 215114233. The next prime is 215114293. The reversal of 215114240 is 42411512.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24341 + ... + 31979.

It is an arithmetic number, because the mean of its divisors is an integer number (7034148).

Almost surely, 2^215114240 is an apocalyptic number.

215114240 is a gapful number since it is divisible by the number (20) 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 215114240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (281365920).

215114240 is an abundant number, since it is smaller than the sum of its proper divisors (347617600).

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

215114240 is an equidigital number, since it uses as much as digits as its factorization.

215114240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7673 (or 7657 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 215114240 is about 14666.7733329455. The cubic root of 215114240 is about 599.1787282192.

Adding to 215114240 its reverse (42411512), we get a palindrome (257525752).

The spelling of 215114240 in words is "two hundred fifteen million, one hundred fourteen thousand, two hundred forty".