220531403 has 2 divisors, whose sum is σ = 220531404. Its totient is φ = 220531402.

The previous prime is 220531373. The next prime is 220531411. The reversal of 220531403 is 304135022.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 220531403 - 2¹⁰ = 220530379 is a prime.

It is not a weakly prime, because it can be changed into another prime (220531483) by changing a digit.

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 as a sum of consecutive naturals, namely, 110265701 + 110265702.

It is an arithmetic number, because the mean of its divisors is an integer number (110265702).

Almost surely, 2^220531403 is an apocalyptic number.

220531403 is a deficient number, since it is larger than the sum of its proper divisors (1).

220531403 is an equidigital number, since it uses as much as digits as its factorization.

220531403 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 220531403 is about 14850.2997612843. The cubic root of 220531403 is about 604.1667403271.

Adding to 220531403 its reverse (304135022), we get a palindrome (524666425).

The spelling of 220531403 in words is "two hundred twenty million, five hundred thirty-one thousand, four hundred three".