215522142 has 32 divisors (see below), whose sum is σ = 486449280. Its totient is φ = 63057120.

The previous prime is 215522129. The next prime is 215522161. The reversal of 215522142 is 241225512.

215522142 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54388 + ... + 58215.

It is an arithmetic number, because the mean of its divisors is an integer number (15201540).

Almost surely, 2^215522142 is an apocalyptic number.

215522142 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

215522142 is an abundant number, since it is smaller than the sum of its proper divisors (270927138).

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

215522142 is a wasteful number, since it uses less digits than its factorization.

215522142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112648.

The product of its digits is 1600, while the sum is 24.

The square root of 215522142 is about 14680.6723960451. The cubic root of 215522142 is about 599.5572122009.

Adding to 215522142 its reverse (241225512), we get a palindrome (456747654).

The spelling of 215522142 in words is "two hundred fifteen million, five hundred twenty-two thousand, one hundred forty-two".