61600220 has 24 divisors (see below), whose sum is σ = 141121008. Its totient is φ = 22400000.

The previous prime is 61600211. The next prime is 61600241. The reversal of 61600220 is 2200616.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 139781 + ... + 140220.

It is an arithmetic number, because the mean of its divisors is an integer number (5880042).

Almost surely, 2^61600220 is an apocalyptic number.

It is an amenable number.

61600220 is an abundant number, since it is smaller than the sum of its proper divisors (79520788).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61600220 is a wasteful number, since it uses less digits than its factorization.

61600220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280021 (or 280019 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 61600220 is about 7848.5807634247. The cubic root of 61600220 is about 394.9366346040.

Adding to 61600220 its reverse (2200616), we get a palindrome (63800836).

The spelling of 61600220 in words is "sixty-one million, six hundred thousand, two hundred twenty".