215440504160 has 96 divisors (see below), whose sum is σ = 583548743232. Its totient is φ = 73629204480.

The previous prime is 215440504151. The next prime is 215440504177. The reversal of 215440504160 is 61405044512.

It is a super-2 number, since 2×215440504160² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

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, 43280 + ... + 657840.

It is an arithmetic number, because the mean of its divisors is an integer number (6078632742).

Almost surely, 2^215440504160 is an apocalyptic number.

215440504160 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 215440504160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (291774371616).

215440504160 is an abundant number, since it is smaller than the sum of its proper divisors (368108239072).

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

215440504160 is a wasteful number, since it uses less digits than its factorization.

215440504160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 614896 (or 614888 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 32.

Adding to 215440504160 its reverse (61405044512), we get a palindrome (276845548672).

The spelling of 215440504160 in words is "two hundred fifteen billion, four hundred forty million, five hundred four thousand, one hundred sixty".