221730070 has 8 divisors (see below), whose sum is σ = 399114144. Its totient is φ = 88692024.

The previous prime is 221730053. The next prime is 221730077. The reversal of 221730070 is 70037122.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221730077) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11086494 + ... + 11086513.

It is an arithmetic number, because the mean of its divisors is an integer number (49889268).

Almost surely, 2^221730070 is an apocalyptic number.

221730070 is a deficient number, since it is larger than the sum of its proper divisors (177384074).

221730070 is a wasteful number, since it uses less digits than its factorization.

221730070 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22173014.

The product of its (nonzero) digits is 588, while the sum is 22.

The square root of 221730070 is about 14890.6034128910. The cubic root of 221730070 is about 605.2593838030.

Adding to 221730070 its reverse (70037122), we get a palindrome (291767192).

The spelling of 221730070 in words is "two hundred twenty-one million, seven hundred thirty thousand, seventy".