215342140 has 24 divisors (see below), whose sum is σ = 487005120. Its totient is φ = 79510848.

The previous prime is 215342137. The next prime is 215342159. The reversal of 215342140 is 41243512.

It is a congruent number.

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, 413860 + ... + 414379.

It is an arithmetic number, because the mean of its divisors is an integer number (20291880).

Almost surely, 2^215342140 is an apocalyptic number.

215342140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

215342140 is an abundant number, since it is smaller than the sum of its proper divisors (271662980).

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

215342140 is a wasteful number, since it uses less digits than its factorization.

215342140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 828261 (or 828259 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 215342140 is about 14674.5405379521. The cubic root of 215342140 is about 599.3902509237.

Adding to 215342140 its reverse (41243512), we get a palindrome (256585652).

The spelling of 215342140 in words is "two hundred fifteen million, three hundred forty-two thousand, one hundred forty".