220431573 has 6 divisors (see below), whose sum is σ = 318401174. Its totient is φ = 146954376.

The previous prime is 220431569. The next prime is 220431593. The reversal of 220431573 is 375134022.

220431573 is a `hidden beast` number, since 220 + 431 + 5 + 7 + 3 = 666.

It can be written as a sum of positive squares in only one way, i.e., 207878724 + 12552849 = 14418^2 + 3543^2 .

It is not a de Polignac number, because 220431573 - 2² = 220431569 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220431593) 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 in 5 ways as a sum of consecutive naturals, for example, 12246190 + ... + 12246207.

Almost surely, 2^220431573 is an apocalyptic number.

It is an amenable number.

220431573 is a deficient number, since it is larger than the sum of its proper divisors (97969601).

220431573 is a wasteful number, since it uses less digits than its factorization.

220431573 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24492403 (or 24492400 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 27.

The square root of 220431573 is about 14846.9381691984. The cubic root of 220431573 is about 604.0755619762.

Adding to 220431573 its reverse (375134022), we get a palindrome (595565595).

The spelling of 220431573 in words is "two hundred twenty million, four hundred thirty-one thousand, five hundred seventy-three".