220512025 has 6 divisors (see below), whose sum is σ = 273434942. Its totient is φ = 176409600.

The previous prime is 220511999. The next prime is 220512029. The reversal of 220512025 is 520215022.

It can be written as a sum of positive squares in 3 ways, for example, as 53275401 + 167236624 = 7299^2 + 12932^2 .

It is a de Polignac number, because none of the positive numbers 2^k-220512025 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 220511993 and 220512011.

It is not an unprimeable number, because it can be changed into a prime (220512029) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4410216 + ... + 4410265.

Almost surely, 2^220512025 is an apocalyptic number.

220512025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

220512025 is a deficient number, since it is larger than the sum of its proper divisors (52922917).

220512025 is an equidigital number, since it uses as much as digits as its factorization.

220512025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8820491 (or 8820486 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 19.

The square root of 220512025 is about 14849.6473022089. The cubic root of 220512025 is about 604.1490438511.

Adding to 220512025 its reverse (520215022), we get a palindrome (740727047).

The spelling of 220512025 in words is "two hundred twenty million, five hundred twelve thousand, twenty-five".