220531523 has 2 divisors, whose sum is σ = 220531524. Its totient is φ = 220531522.

The previous prime is 220531483. The next prime is 220531529. The reversal of 220531523 is 325135022.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 220531523 - 2²⁰ = 219482947 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (220531529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110265761 + 110265762.

It is an arithmetic number, because the mean of its divisors is an integer number (110265762).

Almost surely, 2^220531523 is an apocalyptic number.

220531523 is a deficient number, since it is larger than the sum of its proper divisors (1).

220531523 is an equidigital number, since it uses as much as digits as its factorization.

220531523 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1800, while the sum is 23.

The square root of 220531523 is about 14850.3038016062. The cubic root of 220531523 is about 604.1668499109.

Adding to 220531523 its reverse (325135022), we get a palindrome (545666545).

The spelling of 220531523 in words is "two hundred twenty million, five hundred thirty-one thousand, five hundred twenty-three".