57233213 has 4 divisors (see below), whose sum is σ = 57249948. Its totient is φ = 57216480.

The previous prime is 57233179. The next prime is 57233219. The reversal of 57233213 is 31233275.

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 33154564 + 24078649 = 5758^2 + 4907^2 .

It is a cyclic number.

It is not a de Polignac number, because 57233213 - 2¹⁴ = 57216829 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57233219) 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, 1178 + ... + 10763.

It is an arithmetic number, because the mean of its divisors is an integer number (14312487).

Almost surely, 2^57233213 is an apocalyptic number.

It is an amenable number.

57233213 is a deficient number, since it is larger than the sum of its proper divisors (16735).

57233213 is a wasteful number, since it uses less digits than its factorization.

57233213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16734.

The product of its digits is 3780, while the sum is 26.

The square root of 57233213 is about 7565.2635776951. The cubic root of 57233213 is about 385.3742647147.

Adding to 57233213 its reverse (31233275), we get a palindrome (88466488).

The spelling of 57233213 in words is "fifty-seven million, two hundred thirty-three thousand, two hundred thirteen".