220531522 has 4 divisors (see below), whose sum is σ = 330797286. Its totient is φ = 110265760.

The previous prime is 220531483. The next prime is 220531523. The reversal of 220531522 is 225135022.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 210221001 + 10310521 = 14499^2 + 3211^2 .

It is a junction number, because it is equal to n+sod(n) for n = 220531493 and 220531502.

It is not an unprimeable number, because it can be changed into a prime (220531523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55132879 + ... + 55132882.

Almost surely, 2^220531522 is an apocalyptic number.

220531522 is a deficient number, since it is larger than the sum of its proper divisors (110265764).

220531522 is a wasteful number, since it uses less digits than its factorization.

220531522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110265763.

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 220531522 is about 14850.3037679369. The cubic root of 220531522 is about 604.1668489977.

Adding to 220531522 its reverse (225135022), we get a palindrome (445666544).

The spelling of 220531522 in words is "two hundred twenty million, five hundred thirty-one thousand, five hundred twenty-two".