220531231503 has 32 divisors (see below), whose sum is σ = 356460065280. Its totient is φ = 133638059520.

The previous prime is 220531231469. The next prime is 220531231523. The reversal of 220531231503 is 305132135022.

It is a happy number.

It is not a de Polignac number, because 220531231503 - 2⁸ = 220531231247 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220531231523) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2484750 + ... + 2571972.

It is an arithmetic number, because the mean of its divisors is an integer number (11139377040).

Almost surely, 2^220531231503 is an apocalyptic number.

220531231503 is a deficient number, since it is larger than the sum of its proper divisors (135928833777).

220531231503 is a wasteful number, since it uses less digits than its factorization.

220531231503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95756 (or 95750 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 27.

Adding to 220531231503 its reverse (305132135022), we get a palindrome (525663366525).

The spelling of 220531231503 in words is "two hundred twenty billion, five hundred thirty-one million, two hundred thirty-one thousand, five hundred three".