57021213 has 8 divisors (see below), whose sum is σ = 80500608. Its totient is φ = 35777984.

The previous prime is 57021191. The next prime is 57021227. The reversal of 57021213 is 31212075.

57021213 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 57021213 - 2⁹ = 57020701 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 57021213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57021233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 558981 + ... + 559082.

It is an arithmetic number, because the mean of its divisors is an integer number (10062576).

Almost surely, 2^57021213 is an apocalyptic number.

It is an amenable number.

57021213 is a deficient number, since it is larger than the sum of its proper divisors (23479395).

57021213 is a wasteful number, since it uses less digits than its factorization.

57021213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1118083.

The product of its (nonzero) digits is 420, while the sum is 21.

The square root of 57021213 is about 7551.2391698317. The cubic root of 57021213 is about 384.8978488757.

Adding to 57021213 its reverse (31212075), we get a palindrome (88233288).

The spelling of 57021213 in words is "fifty-seven million, twenty-one thousand, two hundred thirteen".