220430531 has 4 divisors (see below), whose sum is σ = 220891200. Its totient is φ = 219969864.

The previous prime is 220430527. The next prime is 220430543. The reversal of 220430531 is 135034022.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 220430531 - 2² = 220430527 is a prime.

It is a super-2 number, since 2×220430531² = 97179237993883922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (220430501) 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 in 3 ways as a sum of consecutive naturals, for example, 229616 + ... + 230573.

It is an arithmetic number, because the mean of its divisors is an integer number (55222800).

Almost surely, 2^220430531 is an apocalyptic number.

220430531 is a deficient number, since it is larger than the sum of its proper divisors (460669).

220430531 is an equidigital number, since it uses as much as digits as its factorization.

220430531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 460668.

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

The square root of 220430531 is about 14846.9030777466. The cubic root of 220430531 is about 604.0746101348.

Adding to 220430531 its reverse (135034022), we get a palindrome (355464553).

The spelling of 220430531 in words is "two hundred twenty million, four hundred thirty thousand, five hundred thirty-one".