57000206500 has 24 divisors (see below), whose sum is σ = 124488452088. Its totient is φ = 22800082400.

The previous prime is 57000206399. The next prime is 57000206503. The reversal of 57000206500 is 560200075.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 17957608036 + 39042598464 = 134006^2 + 197592^2 .

It is a Harshad number since it is a multiple of its sum of digits (25).

It is not an unprimeable number, because it can be changed into a prime (57000206503) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56999707 + ... + 57000706.

It is an arithmetic number, because the mean of its divisors is an integer number (5187018837).

Almost surely, 2^57000206500 is an apocalyptic number.

57000206500 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

57000206500 is an abundant number, since it is smaller than the sum of its proper divisors (67488245588).

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

57000206500 is a wasteful number, since it uses less digits than its factorization.

57000206500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114000432 (or 114000420 counting only the distinct ones).

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

Adding to 57000206500 its reverse (560200075), we get a palindrome (57560406575).

The spelling of 57000206500 in words is "fifty-seven billion, two hundred six thousand, five hundred".