220001425 has 18 divisors (see below), whose sum is σ = 317342598. Its totient is φ = 150857280.

The previous prime is 220001423. The next prime is 220001447. The reversal of 220001425 is 524100022.

220001425 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 4528384 + 215473041 = 2128^2 + 14679^2 .

It is not a de Polignac number, because 220001425 - 2¹ = 220001423 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 220001399 and 220001408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220001423) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 88572 + ... + 91021.

Almost surely, 2^220001425 is an apocalyptic number.

220001425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

220001425 is a deficient number, since it is larger than the sum of its proper divisors (97341173).

220001425 is a wasteful number, since it uses less digits than its factorization.

220001425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179617 (or 179605 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 16.

The square root of 220001425 is about 14832.4450108537. The cubic root of 220001425 is about 603.6823770793.

Adding to 220001425 its reverse (524100022), we get a palindrome (744101447).

The spelling of 220001425 in words is "two hundred twenty million, one thousand, four hundred twenty-five".