221411207 has 8 divisors (see below), whose sum is σ = 228802560. Its totient is φ = 214035480.

The previous prime is 221411191. The next prime is 221411221. The reversal of 221411207 is 702114122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 221411207 - 2⁴ = 221411191 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221411227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29594 + ... + 36312.

It is an arithmetic number, because the mean of its divisors is an integer number (28600320).

Almost surely, 2^221411207 is an apocalyptic number.

221411207 is a deficient number, since it is larger than the sum of its proper divisors (7391353).

221411207 is a wasteful number, since it uses less digits than its factorization.

221411207 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7813.

The product of its (nonzero) digits is 224, while the sum is 20.

The square root of 221411207 is about 14879.8927079465. The cubic root of 221411207 is about 604.9691098223.

Adding to 221411207 its reverse (702114122), we get a palindrome (923525329).

The spelling of 221411207 in words is "two hundred twenty-one million, four hundred eleven thousand, two hundred seven".