220431974 has 32 divisors (see below), whose sum is σ = 387265536. Its totient is φ = 92139840.

The previous prime is 220431971. The next prime is 220431983. The reversal of 220431974 is 479134022.

It is a self number, because there is not a number n which added to its sum of digits gives 220431974.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220431971) 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 15 ways as a sum of consecutive naturals, for example, 342497 + ... + 343139.

It is an arithmetic number, because the mean of its divisors is an integer number (12102048).

Almost surely, 2^220431974 is an apocalyptic number.

220431974 is a deficient number, since it is larger than the sum of its proper divisors (166833562).

220431974 is a wasteful number, since it uses less digits than its factorization.

220431974 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1220.

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 220431974 is about 14846.9516736602. The cubic root of 220431974 is about 604.0759282791.

Adding to 220431974 its reverse (479134022), we get a palindrome (699565996).

The spelling of 220431974 in words is "two hundred twenty million, four hundred thirty-one thousand, nine hundred seventy-four".