220214521 has 4 divisors (see below), whose sum is σ = 222867792. Its totient is φ = 217561252.

The previous prime is 220214509. The next prime is 220214531. The reversal of 220214521 is 125412022.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 125412022 = 2 ⋅62706011.

It is a cyclic number.

It is not a de Polignac number, because 220214521 - 2²¹ = 218117369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (220214531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1326511 + ... + 1326676.

It is an arithmetic number, because the mean of its divisors is an integer number (55716948).

Almost surely, 2^220214521 is an apocalyptic number.

It is an amenable number.

220214521 is a deficient number, since it is larger than the sum of its proper divisors (2653271).

220214521 is an equidigital number, since it uses as much as digits as its factorization.

220214521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2653270.

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 220214521 is about 14839.6267136340. The cubic root of 220214521 is about 603.8772254950.

Adding to 220214521 its reverse (125412022), we get a palindrome (345626543).

The spelling of 220214521 in words is "two hundred twenty million, two hundred fourteen thousand, five hundred twenty-one".