215342380 has 48 divisors (see below), whose sum is σ = 495774720. Its totient is φ = 77918400.

The previous prime is 215342363. The next prime is 215342381. The reversal of 215342380 is 83243512.

It is not an unprimeable number, because it can be changed into a prime (215342381) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44101 + ... + 48739.

It is an arithmetic number, because the mean of its divisors is an integer number (10328640).

Almost surely, 2^215342380 is an apocalyptic number.

215342380 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 215342380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (247887360).

215342380 is an abundant number, since it is smaller than the sum of its proper divisors (280432340).

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

215342380 is a wasteful number, since it uses less digits than its factorization.

215342380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4870 (or 4868 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 215342380 is about 14674.5487153779. The cubic root of 215342380 is about 599.3904735982.

Adding to 215342380 its reverse (83243512), we get a palindrome (298585892).

The spelling of 215342380 in words is "two hundred fifteen million, three hundred forty-two thousand, three hundred eighty".