220531530 has 32 divisors (see below), whose sum is σ = 530452224. Its totient is φ = 58677696.

The previous prime is 220531529. The next prime is 220531547. The reversal of 220531530 is 35135022.

220531530 = T₆₉₉₆ + T₆₉₉₇ + ... + T₇₀₀₄.

It is a junction number, because it is equal to n+sod(n) for n = 220531497 and 220531506.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5952 + ... + 21828.

It is an arithmetic number, because the mean of its divisors is an integer number (16576632).

Almost surely, 2^220531530 is an apocalyptic number.

220531530 is an abundant number, since it is smaller than the sum of its proper divisors (309920694).

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

220531530 is a wasteful number, since it uses less digits than its factorization.

220531530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16350.

The product of its (nonzero) digits is 900, while the sum is 21.

The square root of 220531530 is about 14850.3040372916. The cubic root of 220531530 is about 604.1668563033.

Adding to 220531530 its reverse (35135022), we get a palindrome (255666552).

The spelling of 220531530 in words is "two hundred twenty million, five hundred thirty-one thousand, five hundred thirty".