215104040 has 64 divisors (see below), whose sum is σ = 511902720. Its totient is φ = 81216000.

The previous prime is 215104039. The next prime is 215104139. The reversal of 215104040 is 40401512.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48725 + ... + 52955.

It is an arithmetic number, because the mean of its divisors is an integer number (7998480).

Almost surely, 2^215104040 is an apocalyptic number.

215104040 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 215104040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (255951360).

215104040 is an abundant number, since it is smaller than the sum of its proper divisors (296798680).

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

215104040 is a wasteful number, since it uses less digits than its factorization.

215104040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4314 (or 4310 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 215104040 is about 14666.4256040795. The cubic root of 215104040 is about 599.1692577170.

Adding to 215104040 its reverse (40401512), we get a palindrome (255505552).

The spelling of 215104040 in words is "two hundred fifteen million, one hundred four thousand, forty".