215343420 has 96 divisors (see below), whose sum is σ = 649083456. Its totient is φ = 53145600.

The previous prime is 215343419. The next prime is 215343431. The reversal of 215343420 is 24343512.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 60490 + ... + 63950.

It is an arithmetic number, because the mean of its divisors is an integer number (6761286).

Almost surely, 2^215343420 is an apocalyptic number.

215343420 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 215343420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (324541728).

215343420 is an abundant number, since it is smaller than the sum of its proper divisors (433740036).

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

215343420 is a wasteful number, since it uses less digits than its factorization.

215343420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3551 (or 3549 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 24.

The square root of 215343420 is about 14674.5841508371. The cubic root of 215343420 is about 599.3914385191.

Adding to 215343420 its reverse (24343512), we get a palindrome (239686932).

The spelling of 215343420 in words is "two hundred fifteen million, three hundred forty-three thousand, four hundred twenty".