220431320 has 32 divisors (see below), whose sum is σ = 513075600. Its totient is φ = 85131648.

The previous prime is 220431313. The next prime is 220431329. The reversal of 220431320 is 23134022.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220431329) 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 7 ways as a sum of consecutive naturals, for example, 93854 + ... + 96173.

Almost surely, 2^220431320 is an apocalyptic number.

220431320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

220431320 is an abundant number, since it is smaller than the sum of its proper divisors (292644280).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

220431320 is a wasteful number, since it uses less digits than its factorization.

220431320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190067 (or 190063 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 220431320 is about 14846.9296489207. The cubic root of 220431320 is about 604.0753308672.

Adding to 220431320 its reverse (23134022), we get a palindrome (243565342).

The spelling of 220431320 in words is "two hundred twenty million, four hundred thirty-one thousand, three hundred twenty".