220100825 has 12 divisors (see below), whose sum is σ = 311914560. Its totient is φ = 150926160.

The previous prime is 220100821. The next prime is 220100843. The reversal of 220100825 is 528001022.

It is not a de Polignac number, because 220100825 - 2² = 220100821 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 220100797 and 220100806.

It is not an unprimeable number, because it can be changed into a prime (220100821) 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, 628685 + ... + 629034.

It is an arithmetic number, because the mean of its divisors is an integer number (25992880).

Almost surely, 2^220100825 is an apocalyptic number.

220100825 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

220100825 is a deficient number, since it is larger than the sum of its proper divisors (91813735).

220100825 is a wasteful number, since it uses less digits than its factorization.

220100825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1257736 (or 1257731 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 220100825 is about 14835.7953949224. The cubic root of 220100825 is about 603.7732810258.

Adding to 220100825 its reverse (528001022), we get a palindrome (748101847).

The spelling of 220100825 in words is "two hundred twenty million, one hundred thousand, eight hundred twenty-five".