57820313 has 4 divisors (see below), whose sum is σ = 57835728. Its totient is φ = 57804900.

The previous prime is 57820309. The next prime is 57820331. The reversal of 57820313 is 31302875.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 57820313 - 2² = 57820309 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (57820333) 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, 1970 + ... + 10932.

It is an arithmetic number, because the mean of its divisors is an integer number (14458932).

Almost surely, 2^57820313 is an apocalyptic number.

It is an amenable number.

57820313 is a deficient number, since it is larger than the sum of its proper divisors (15415).

57820313 is an equidigital number, since it uses as much as digits as its factorization.

57820313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15414.

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 57820313 is about 7603.9669252305. The cubic root of 57820313 is about 386.6875113449.

The spelling of 57820313 in words is "fifty-seven million, eight hundred twenty thousand, three hundred thirteen".