57058321 has 4 divisors (see below), whose sum is σ = 58898944. Its totient is φ = 55217700.

The previous prime is 57058319. The next prime is 57058343. The reversal of 57058321 is 12385075.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 57058321 - 2¹ = 57058319 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31), and also a Moran number because the ratio is a prime number: 1840591 = 57058321 / (5 + 7 + 0 + 5 + 8 + 3 + 2 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (57058021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 920265 + ... + 920326.

It is an arithmetic number, because the mean of its divisors is an integer number (14724736).

Almost surely, 2^57058321 is an apocalyptic number.

It is an amenable number.

57058321 is a deficient number, since it is larger than the sum of its proper divisors (1840623).

57058321 is a wasteful number, since it uses less digits than its factorization.

57058321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1840622.

The product of its (nonzero) digits is 8400, while the sum is 31.

The square root of 57058321 is about 7553.6958503768. The cubic root of 57058321 is about 384.9813247814.

The spelling of 57058321 in words is "fifty-seven million, fifty-eight thousand, three hundred twenty-one".