215247142 has 24 divisors (see below), whose sum is σ = 356945400. Its totient is φ = 97273440.

The previous prime is 215247127. The next prime is 215247161. The reversal of 215247142 is 241742512.

It is a self number, because there is not a number n which added to its sum of digits gives 215247142.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 40834 + ... + 45802.

It is an arithmetic number, because the mean of its divisors is an integer number (14872725).

Almost surely, 2^215247142 is an apocalyptic number.

215247142 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

215247142 is a deficient number, since it is larger than the sum of its proper divisors (141698258).

215247142 is a wasteful number, since it uses less digits than its factorization.

215247142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5172 (or 5161 counting only the distinct ones).

The product of its digits is 4480, while the sum is 28.

The square root of 215247142 is about 14671.3033504185. The cubic root of 215247142 is about 599.3020977949.

Adding to 215247142 its reverse (241742512), we get a palindrome (456989654).

It can be divided in two parts, 2152 and 47142, that added together give a palindrome (49294).

The spelling of 215247142 in words is "two hundred fifteen million, two hundred forty-seven thousand, one hundred forty-two".