215542080 has 448 divisors, whose sum is σ = 870508800. Its totient is φ = 49766400.

The previous prime is 215542079. The next prime is 215542091. The reversal of 215542080 is 80245512.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2134030 + ... + 2134130.

It is an arithmetic number, because the mean of its divisors is an integer number (1943100).

Almost surely, 2^215542080 is an apocalyptic number.

215542080 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 215542080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (435254400).

215542080 is an abundant number, since it is smaller than the sum of its proper divisors (654966720).

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

215542080 is a wasteful number, since it uses less digits than its factorization.

215542080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159 (or 143 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 27.

The square root of 215542080 is about 14681.3514364312. The cubic root of 215542080 is about 599.5757000199.

Adding to 215542080 its reverse (80245512), we get a palindrome (295787592).

The spelling of 215542080 in words is "two hundred fifteen million, five hundred forty-two thousand, eighty".