215142306 has 16 divisors (see below), whose sum is σ = 430429248. Its totient is φ = 71690000.

The previous prime is 215142251. The next prime is 215142313. The reversal of 215142306 is 603241512.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28756 + ... + 35456.

It is an arithmetic number, because the mean of its divisors is an integer number (26901828).

Almost surely, 2^215142306 is an apocalyptic number.

215142306 is an abundant number, since it is smaller than the sum of its proper divisors (215286942).

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

215142306 is a wasteful number, since it uses less digits than its factorization.

215142306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12057.

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 215142306 is about 14667.7300902355. The cubic root of 215142306 is about 599.2047854108.

Adding to 215142306 its reverse (603241512), we get a palindrome (818383818).

The spelling of 215142306 in words is "two hundred fifteen million, one hundred forty-two thousand, three hundred six".