220204531 has 2 divisors, whose sum is σ = 220204532. Its totient is φ = 220204530.

The previous prime is 220204493. The next prime is 220204619. The reversal of 220204531 is 135402022.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 220204531 - 2⁷ = 220204403 is a prime.

It is a super-2 number, since 2×220204531² = 96980070945859922, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 220204499 and 220204508.

It is not a weakly prime, because it can be changed into another prime (220204331) 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, 110102265 + 110102266.

It is an arithmetic number, because the mean of its divisors is an integer number (110102266).

Almost surely, 2^220204531 is an apocalyptic number.

220204531 is a deficient number, since it is larger than the sum of its proper divisors (1).

220204531 is an equidigital number, since it uses as much as digits as its factorization.

220204531 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 220204531 is about 14839.2901110532. The cubic root of 220204531 is about 603.8680937558.

Adding to 220204531 its reverse (135402022), we get a palindrome (355606553).

The spelling of 220204531 in words is "two hundred twenty million, two hundred four thousand, five hundred thirty-one".