220142215 has 4 divisors (see below), whose sum is σ = 264170664. Its totient is φ = 176113768.

The previous prime is 220142203. The next prime is 220142287. The reversal of 220142215 is 512241022.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 512241022 = 2 ⋅256120511.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-220142215 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 220142192 and 220142201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22014217 + ... + 22014226.

It is an arithmetic number, because the mean of its divisors is an integer number (66042666).

Almost surely, 2^220142215 is an apocalyptic number.

220142215 is a deficient number, since it is larger than the sum of its proper divisors (44028449).

220142215 is an equidigital number, since it uses as much as digits as its factorization.

220142215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44028448.

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 220142215 is about 14837.1902663543. The cubic root of 220142215 is about 603.8111252120.

Adding to 220142215 its reverse (512241022), we get a palindrome (732383237).

The spelling of 220142215 in words is "two hundred twenty million, one hundred forty-two thousand, two hundred fifteen".