57102020 has 12 divisors (see below), whose sum is σ = 119914284. Its totient is φ = 22840800.

The previous prime is 57102013. The next prime is 57102037. The reversal of 57102020 is 2020175.

It can be written as a sum of positive squares in 2 ways, for example, as 42094144 + 15007876 = 6488^2 + 3874^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 57102020.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1427531 + ... + 1427570.

It is an arithmetic number, because the mean of its divisors is an integer number (9992857).

Almost surely, 2^57102020 is an apocalyptic number.

It is an amenable number.

57102020 is an abundant number, since it is smaller than the sum of its proper divisors (62812264).

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

57102020 is a wasteful number, since it uses less digits than its factorization.

57102020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2855110 (or 2855108 counting only the distinct ones).

The product of its (nonzero) digits is 140, while the sum is 17.

The square root of 57102020 is about 7556.5878543163. The cubic root of 57102020 is about 385.0795810080.

Adding to 57102020 its reverse (2020175), we get a palindrome (59122195).

The spelling of 57102020 in words is "fifty-seven million, one hundred two thousand, twenty".