57209313 has 32 divisors (see below), whose sum is σ = 90720000. Its totient is φ = 32043648.

The previous prime is 57209287. The next prime is 57209333. The reversal of 57209313 is 31390275.

It is not a de Polignac number, because 57209313 - 2⁵ = 57209281 is a prime.

It is not an unprimeable number, because it can be changed into a prime (57209333) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 54013 + ... + 55061.

It is an arithmetic number, because the mean of its divisors is an integer number (2835000).

Almost surely, 2^57209313 is an apocalyptic number.

57209313 is a gapful number since it is divisible by the number (53) formed by its first and last digit.

It is an amenable number.

57209313 is a deficient number, since it is larger than the sum of its proper divisors (33510687).

57209313 is a wasteful number, since it uses less digits than its factorization.

57209313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1126 (or 1112 counting only the distinct ones).

The product of its (nonzero) digits is 5670, while the sum is 30.

The square root of 57209313 is about 7563.6838246981. The cubic root of 57209313 is about 385.3206144721.

Adding to 57209313 its reverse (31390275), we get a palindrome (88599588).

The spelling of 57209313 in words is "fifty-seven million, two hundred nine thousand, three hundred thirteen".