221760213 has 8 divisors (see below), whose sum is σ = 296918400. Its totient is φ = 147221088.

The previous prime is 221760211. The next prime is 221760221. The reversal of 221760213 is 312067122.

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

It is not a de Polignac number, because 221760213 - 2¹ = 221760211 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221760211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 153928 + ... + 155361.

It is an arithmetic number, because the mean of its divisors is an integer number (37114800).

Almost surely, 2^221760213 is an apocalyptic number.

It is an amenable number.

221760213 is a deficient number, since it is larger than the sum of its proper divisors (75158187).

221760213 is a wasteful number, since it uses less digits than its factorization.

221760213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 309531.

The product of its (nonzero) digits is 1008, while the sum is 24.

The square root of 221760213 is about 14891.6155268661. The cubic root of 221760213 is about 605.2868098033.

The spelling of 221760213 in words is "two hundred twenty-one million, seven hundred sixty thousand, two hundred thirteen".