57613220 has 36 divisors (see below), whose sum is σ = 140743260. Its totient is φ = 19752768.

The previous prime is 57613189. The next prime is 57613223. The reversal of 57613220 is 2231675.

It can be written as a sum of positive squares in 2 ways, for example, as 43112356 + 14500864 = 6566^2 + 3808^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 57613220.

It is not an unprimeable number, because it can be changed into a prime (57613223) 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, 28415 + ... + 30374.

It is an arithmetic number, because the mean of its divisors is an integer number (3909535).

Almost surely, 2^57613220 is an apocalyptic number.

It is an amenable number.

57613220 is an abundant number, since it is smaller than the sum of its proper divisors (83130040).

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

57613220 is a wasteful number, since it uses less digits than its factorization.

57613220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58812 (or 58803 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 26.

The square root of 57613220 is about 7590.3372784086. The cubic root of 57613220 is about 386.2252973453.

Adding to 57613220 its reverse (2231675), we get a palindrome (59844895).

The spelling of 57613220 in words is "fifty-seven million, six hundred thirteen thousand, two hundred twenty".