57111420 has 48 divisors (see below), whose sum is σ = 160288128. Its totient is φ = 15193920.

The previous prime is 57111413. The next prime is 57111421. The reversal of 57111420 is 2411175.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57111421) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 33427 + ... + 35093.

It is an arithmetic number, because the mean of its divisors is an integer number (3339336).

Almost surely, 2^57111420 is an apocalyptic number.

It is an amenable number.

57111420 is an abundant number, since it is smaller than the sum of its proper divisors (103176708).

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

57111420 is a wasteful number, since it uses less digits than its factorization.

57111420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2250 (or 2248 counting only the distinct ones).

The product of its (nonzero) digits is 280, while the sum is 21.

The square root of 57111420 is about 7557.2098025660. The cubic root of 57111420 is about 385.1007101464.

Adding to 57111420 its reverse (2411175), we get a palindrome (59522595).

The spelling of 57111420 in words is "fifty-seven million, one hundred eleven thousand, four hundred twenty".