220396725 has 18 divisors (see below), whose sum is σ = 394755426. Its totient is φ = 117544800.

The previous prime is 220396717. The next prime is 220396727. The reversal of 220396725 is 527693022.

It can be written as a sum of positive squares in 3 ways, for example, as 4835601 + 215561124 = 2199^2 + 14682^2 .

It is not a de Polignac number, because 220396725 - 2³ = 220396717 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 220396725.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220396727) 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, 489546 + ... + 489995.

It is an arithmetic number, because the mean of its divisors is an integer number (21930857).

Almost surely, 2^220396725 is an apocalyptic number.

220396725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

220396725 is a deficient number, since it is larger than the sum of its proper divisors (174358701).

220396725 is a wasteful number, since it uses less digits than its factorization.

220396725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 979557 (or 979549 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 36.

The square root of 220396725 is about 14845.7645475065. The cubic root of 220396725 is about 604.0437275551.

The spelling of 220396725 in words is "two hundred twenty million, three hundred ninety-six thousand, seven hundred twenty-five".