215143340 has 24 divisors (see below), whose sum is σ = 459210192. Its totient is φ = 84646080.

The previous prime is 215143339. The next prime is 215143343. The reversal of 215143340 is 43341512.

It is not an unprimeable number, because it can be changed into a prime (215143343) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 86954 + ... + 89393.

It is an arithmetic number, because the mean of its divisors is an integer number (19133758).

Almost surely, 2^215143340 is an apocalyptic number.

215143340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

215143340 is an abundant number, since it is smaller than the sum of its proper divisors (244066852).

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

215143340 is a wasteful number, since it uses less digits than its factorization.

215143340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176417 (or 176415 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 215143340 is about 14667.7653376375. The cubic root of 215143340 is about 599.2057453595.

Adding to 215143340 its reverse (43341512), we get a palindrome (258484852).

The spelling of 215143340 in words is "two hundred fifteen million, one hundred forty-three thousand, three hundred forty".