222120520 has 32 divisors (see below), whose sum is σ = 507969720. Its totient is φ = 87390720.

The previous prime is 222120517. The next prime is 222120557. The reversal of 222120520 is 25021222.

It can be written as a sum of positive squares in 4 ways, for example, as 148401124 + 73719396 = 12182^2 + 8586^2 .

It is a junction number, because it is equal to n+sod(n) for n = 222120494 and 222120503.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 43077 + ... + 47956.

Almost surely, 2^222120520 is an apocalyptic number.

222120520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

222120520 is an abundant number, since it is smaller than the sum of its proper divisors (285849200).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

222120520 is a wasteful number, since it uses less digits than its factorization.

222120520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91105 (or 91101 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 16.

The square root of 222120520 is about 14903.7082633820. The cubic root of 222120520 is about 605.6144475763.

Adding to 222120520 its reverse (25021222), we get a palindrome (247141742).

The spelling of 222120520 in words is "two hundred twenty-two million, one hundred twenty thousand, five hundred twenty".