57048821 has 4 divisors (see below), whose sum is σ = 60404652. Its totient is φ = 53692992.

The previous prime is 57048793. The next prime is 57048839. The reversal of 57048821 is 12884075.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 33477796 + 23571025 = 5786^2 + 4855^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-57048821 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57048851) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1677890 + ... + 1677923.

It is an arithmetic number, because the mean of its divisors is an integer number (15101163).

Almost surely, 2^57048821 is an apocalyptic number.

It is an amenable number.

57048821 is a deficient number, since it is larger than the sum of its proper divisors (3355831).

57048821 is a wasteful number, since it uses less digits than its factorization.

57048821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3355830.

The product of its (nonzero) digits is 17920, while the sum is 35.

The square root of 57048821 is about 7553.0669929506. The cubic root of 57048821 is about 384.9599576053.

The spelling of 57048821 in words is "fifty-seven million, forty-eight thousand, eight hundred twenty-one".