57061220 has 48 divisors (see below), whose sum is σ = 123150720. Its totient is φ = 22201344.

The previous prime is 57061219. The next prime is 57061223. The reversal of 57061220 is 2216075.

It is not an unprimeable number, because it can be changed into a prime (57061223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 129761 + ... + 130199.

It is an arithmetic number, because the mean of its divisors is an integer number (2565640).

Almost surely, 2^57061220 is an apocalyptic number.

It is an amenable number.

57061220 is an abundant number, since it is smaller than the sum of its proper divisors (66089500).

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

57061220 is a wasteful number, since it uses less digits than its factorization.

57061220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 612 (or 610 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 57061220 is about 7553.8877407597. The cubic root of 57061220 is about 384.9878446716.

Adding to 57061220 its reverse (2216075), we get a palindrome (59277295).

The spelling of 57061220 in words is "fifty-seven million, sixty-one thousand, two hundred twenty".