221422130 has 8 divisors (see below), whose sum is σ = 398559852. Its totient is φ = 88568848.

The previous prime is 221422129. The next prime is 221422133. The reversal of 221422130 is 31224122.

It can be written as a sum of positive squares in 2 ways, for example, as 218418841 + 3003289 = 14779^2 + 1733^2 .

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

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 221422099 and 221422108.

It is not an unprimeable number, because it can be changed into a prime (221422133) 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, 11071097 + ... + 11071116.

Almost surely, 2^221422130 is an apocalyptic number.

221422130 is a deficient number, since it is larger than the sum of its proper divisors (177137722).

221422130 is a wasteful number, since it uses less digits than its factorization.

221422130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22142220.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 221422130 is about 14880.2597423567. The cubic root of 221422130 is about 604.9790580826.

Adding to 221422130 its reverse (31224122), we get a palindrome (252646252).

The spelling of 221422130 in words is "two hundred twenty-one million, four hundred twenty-two thousand, one hundred thirty".