57351220 has 12 divisors (see below), whose sum is σ = 120437604. Its totient is φ = 22940480.

The previous prime is 57351211. The next prime is 57351289. The reversal of 57351220 is 2215375.

57351220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 12702096 + 44649124 = 3564^2 + 6682^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1433761 + ... + 1433800.

It is an arithmetic number, because the mean of its divisors is an integer number (10036467).

Almost surely, 2^57351220 is an apocalyptic number.

It is an amenable number.

57351220 is an abundant number, since it is smaller than the sum of its proper divisors (63086384).

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

57351220 is a wasteful number, since it uses less digits than its factorization.

57351220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2867570 (or 2867568 counting only the distinct ones).

The product of its (nonzero) digits is 2100, while the sum is 25.

The square root of 57351220 is about 7573.0588271847. The cubic root of 57351220 is about 385.6389457659.

Adding to 57351220 its reverse (2215375), we get a palindrome (59566595).

The spelling of 57351220 in words is "fifty-seven million, three hundred fifty-one thousand, two hundred twenty".