221314215 has 16 divisors (see below), whose sum is σ = 354358368. Its totient is φ = 117949056.

The previous prime is 221314189. The next prime is 221314217. The reversal of 221314215 is 512413122.

It is not a de Polignac number, because 221314215 - 2⁸ = 221313959 is a prime.

It is a super-2 number, since 2×221314215² = 97959963522132450, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 221314191 and 221314200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221314217) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20049 + ... + 29061.

It is an arithmetic number, because the mean of its divisors is an integer number (22147398).

Almost surely, 2^221314215 is an apocalyptic number.

221314215 is a deficient number, since it is larger than the sum of its proper divisors (133044153).

221314215 is a wasteful number, since it uses less digits than its factorization.

221314215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10658.

The product of its digits is 480, while the sum is 21.

The square root of 221314215 is about 14876.6331876537. The cubic root of 221314215 is about 604.8807587780.

Adding to 221314215 its reverse (512413122), we get a palindrome (733727337).

The spelling of 221314215 in words is "two hundred twenty-one million, three hundred fourteen thousand, two hundred fifteen".