220940975 has 12 divisors (see below), whose sum is σ = 274662480. Its totient is φ = 176304000.

The previous prime is 220940971. The next prime is 220940977. The reversal of 220940975 is 579049022.

It is not a de Polignac number, because 220940975 - 2² = 220940971 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220940971) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 995 + ... + 21044.

It is an arithmetic number, because the mean of its divisors is an integer number (22888540).

Almost surely, 2^220940975 is an apocalyptic number.

220940975 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

220940975 is a deficient number, since it is larger than the sum of its proper divisors (53721505).

220940975 is a wasteful number, since it uses less digits than its factorization.

220940975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22450 (or 22445 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 38.

The square root of 220940975 is about 14864.0833891633. The cubic root of 220940975 is about 604.5405294963.

Adding to 220940975 its reverse (579049022), we get a palindrome (799989997).

The spelling of 220940975 in words is "two hundred twenty million, nine hundred forty thousand, nine hundred seventy-five".