221513071 has 8 divisors (see below), whose sum is σ = 239057280. Its totient is φ = 204040992.

The previous prime is 221513063. The next prime is 221513093. The reversal of 221513071 is 170315122.

It is a happy number.

221513071 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 221513071 - 2³ = 221513063 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 (221514071) 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, 11560 + ... + 24013.

It is an arithmetic number, because the mean of its divisors is an integer number (29882160).

Almost surely, 2^221513071 is an apocalyptic number.

221513071 is a deficient number, since it is larger than the sum of its proper divisors (17544209).

221513071 is a wasteful number, since it uses less digits than its factorization.

221513071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36065.

The product of its (nonzero) digits is 420, while the sum is 22.

The square root of 221513071 is about 14883.3151884921. The cubic root of 221513071 is about 605.0618710488.

Adding to 221513071 its reverse (170315122), we get a palindrome (391828193).

The spelling of 221513071 in words is "two hundred twenty-one million, five hundred thirteen thousand, seventy-one".