220145125 has 8 divisors (see below), whose sum is σ = 274741272. Its totient is φ = 176116000.

The previous prime is 220145111. The next prime is 220145129. The reversal of 220145125 is 521541022.

It can be written as a sum of positive squares in 4 ways, for example, as 13734436 + 206410689 = 3706^2 + 14367^2 .

It is not a de Polignac number, because 220145125 - 2¹⁹ = 219620837 is a prime.

It is a super-2 number, since 2×220145125² = 96927752122531250, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 220145096 and 220145105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220145129) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 880456 + ... + 880705.

It is an arithmetic number, because the mean of its divisors is an integer number (34342659).

Almost surely, 2^220145125 is an apocalyptic number.

220145125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

220145125 is a deficient number, since it is larger than the sum of its proper divisors (54596147).

220145125 is an equidigital number, since it uses as much as digits as its factorization.

220145125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1761176 (or 1761166 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 22.

The square root of 220145125 is about 14837.2883304194. The cubic root of 220145125 is about 603.8137857386.

Adding to 220145125 its reverse (521541022), we get a palindrome (741686147).

The spelling of 220145125 in words is "two hundred twenty million, one hundred forty-five thousand, one hundred twenty-five".