220857925 has 12 divisors (see below), whose sum is σ = 277723296. Its totient is φ = 174196400.

The previous prime is 220857911. The next prime is 220857977. The reversal of 220857925 is 529758022.

It is not a de Polignac number, because 220857925 - 2⁵ = 220857893 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 60439 + ... + 63988.

It is an arithmetic number, because the mean of its divisors is an integer number (23143608).

Almost surely, 2^220857925 is an apocalyptic number.

220857925 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

220857925 is a deficient number, since it is larger than the sum of its proper divisors (56865371).

220857925 is a wasteful number, since it uses less digits than its factorization.

220857925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124508 (or 124503 counting only the distinct ones).

The product of its (nonzero) digits is 100800, while the sum is 40.

The square root of 220857925 is about 14861.2894797188. The cubic root of 220857925 is about 604.4647726369.

The spelling of 220857925 in words is "two hundred twenty million, eight hundred fifty-seven thousand, nine hundred twenty-five".