57051921 has 8 divisors (see below), whose sum is σ = 76282560. Its totient is φ = 37927952.

The previous prime is 57051913. The next prime is 57051947. The reversal of 57051921 is 12915075.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 57051921 - 2³ = 57051913 is a prime.

It is not an unprimeable number, because it can be changed into a prime (57051121) 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, 25410 + ... + 27563.

It is an arithmetic number, because the mean of its divisors is an integer number (9535320).

Almost surely, 2^57051921 is an apocalyptic number.

It is an amenable number.

57051921 is a deficient number, since it is larger than the sum of its proper divisors (19230639).

57051921 is a wasteful number, since it uses less digits than its factorization.

57051921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53335.

The product of its (nonzero) digits is 3150, while the sum is 30.

The square root of 57051921 is about 7553.2722048130. The cubic root of 57051921 is about 384.9669303130.

Adding to 57051921 its reverse (12915075), we get a palindrome (69966996).

It can be divided in two parts, 5705 and 1921, that added together give a triangular number (7626 = T₁₂₃).

The spelling of 57051921 in words is "fifty-seven million, fifty-one thousand, nine hundred twenty-one".