220925 has 6 divisors (see below), whose sum is σ = 273978. Its totient is φ = 176720.

The previous prime is 220919. The next prime is 220931. The reversal of 220925 is 529022.

It is an interprime number because it is at equal distance from previous prime (220919) and next prime (220931).

It can be written as a sum of positive squares in 3 ways, for example, as 77284 + 143641 = 278^2 + 379^2 .

It is not a de Polignac number, because 220925 - 2⁶ = 220861 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 220897 and 220906.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 220925.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4394 + ... + 4443.

It is an arithmetic number, because the mean of its divisors is an integer number (45663).

2²²⁰⁹²⁵ is an apocalyptic number.

220925 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

220925 is a deficient number, since it is larger than the sum of its proper divisors (53053).

220925 is an equidigital number, since it uses as much as digits as its factorization.

220925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8847 (or 8842 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 220925 is about 470.0265949922. The cubic root of 220925 is about 60.4525958836.

Adding to 220925 its reverse (529022), we get a palindrome (749947).

It can be divided in two parts, 2209 and 25, that multiplied together give a square (55225 = 235²).

The spelling of 220925 in words is "two hundred twenty thousand, nine hundred twenty-five".