221077213 has 8 divisors (see below), whose sum is σ = 260810240. Its totient is φ = 183381840.

The previous prime is 221077211. The next prime is 221077229. The reversal of 221077213 is 312770122.

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 221077213 - 2¹ = 221077211 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 (221077211) 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, 509178 + ... + 509611.

It is an arithmetic number, because the mean of its divisors is an integer number (32601280).

Almost surely, 2^221077213 is an apocalyptic number.

It is an amenable number.

221077213 is a deficient number, since it is larger than the sum of its proper divisors (39733027).

221077213 is a wasteful number, since it uses less digits than its factorization.

221077213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1018827.

The product of its (nonzero) digits is 1176, while the sum is 25.

The square root of 221077213 is about 14868.6654747492. The cubic root of 221077213 is about 604.6647624801.

The spelling of 221077213 in words is "two hundred twenty-one million, seventy-seven thousand, two hundred thirteen".