221234313 has 8 divisors (see below), whose sum is σ = 297132768. Its totient is φ = 146412704.

The previous prime is 221234297. The next prime is 221234317. The reversal of 221234313 is 313432122.

221234313 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 221234313 - 2⁴ = 221234297 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 221234313.

It is not an unprimeable number, because it can be changed into a prime (221234317) 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, 268731 + ... + 269552.

It is an arithmetic number, because the mean of its divisors is an integer number (37141596).

Almost surely, 2^221234313 is an apocalyptic number.

It is an amenable number.

221234313 is a deficient number, since it is larger than the sum of its proper divisors (75898455).

221234313 is a wasteful number, since it uses less digits than its factorization.

221234313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 538423.

The product of its digits is 864, while the sum is 21.

The square root of 221234313 is about 14873.9474585599. The cubic root of 221234313 is about 604.8079558028.

Adding to 221234313 its reverse (313432122), we get a palindrome (534666435).

It can be divided in two parts, 2212343 and 13, that added together give a triangular number (2212356 = T₂₁₀₃).

The spelling of 221234313 in words is "two hundred twenty-one million, two hundred thirty-four thousand, three hundred thirteen".