215341040 has 80 divisors (see below), whose sum is σ = 533537280. Its totient is φ = 80547840.

The previous prime is 215341039. The next prime is 215341069. The reversal of 215341040 is 40143512.

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 a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 259346 + ... + 260174.

It is an arithmetic number, because the mean of its divisors is an integer number (6669216).

Almost surely, 2^215341040 is an apocalyptic number.

215341040 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 215341040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (266768640).

215341040 is an abundant number, since it is smaller than the sum of its proper divisors (318196240).

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

215341040 is a wasteful number, since it uses less digits than its factorization.

215341040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1050 (or 1044 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 215341040 is about 14674.5030580255. The cubic root of 215341040 is about 599.3892303302.

Adding to 215341040 its reverse (40143512), we get a palindrome (255484552).

The spelling of 215341040 in words is "two hundred fifteen million, three hundred forty-one thousand, forty".