221215130 has 8 divisors (see below), whose sum is σ = 398187252. Its totient is φ = 88486048.

The previous prime is 221215129. The next prime is 221215153. The reversal of 221215130 is 31512122.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 179211769 + 42003361 = 13387^2 + 6481^2 .

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

It is a super-2 number, since 2×221215130² = 97872267481833800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 221215099 and 221215108.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 11060747 + ... + 11060766.

Almost surely, 2^221215130 is an apocalyptic number.

221215130 is a deficient number, since it is larger than the sum of its proper divisors (176972122).

221215130 is a wasteful number, since it uses less digits than its factorization.

221215130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22121520.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 221215130 is about 14873.3025922288. The cubic root of 221215130 is about 604.7904745387.

Adding to 221215130 its reverse (31512122), we get a palindrome (252727252).

The spelling of 221215130 in words is "two hundred twenty-one million, two hundred fifteen thousand, one hundred thirty".