57271620 has 48 divisors (see below), whose sum is σ = 183270528. Its totient is φ = 13090560.

The previous prime is 57271609. The next prime is 57271649. The reversal of 57271620 is 2617275.

57271620 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (30).

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 15 ways as a sum of consecutive naturals, for example, 67761 + ... + 68600.

It is an arithmetic number, because the mean of its divisors is an integer number (3818136).

Almost surely, 2^57271620 is an apocalyptic number.

It is an amenable number.

57271620 is an abundant number, since it is smaller than the sum of its proper divisors (125998908).

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

57271620 is a wasteful number, since it uses less digits than its factorization.

57271620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136380 (or 136378 counting only the distinct ones).

The product of its (nonzero) digits is 5880, while the sum is 30.

The square root of 57271620 is about 7567.8015301671. The cubic root of 57271620 is about 385.4604487038.

Adding to 57271620 its reverse (2617275), we get a palindrome (59888895).

The spelling of 57271620 in words is "fifty-seven million, two hundred seventy-one thousand, six hundred twenty".