57440313 has 16 divisors (see below), whose sum is σ = 97253760. Its totient is φ = 32822928.

The previous prime is 57440311. The next prime is 57440321. The reversal of 57440313 is 31304475.

It is not a de Polignac number, because 57440313 - 2¹ = 57440311 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (57440311) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 151770 + ... + 152147.

It is an arithmetic number, because the mean of its divisors is an integer number (6078360).

Almost surely, 2^57440313 is an apocalyptic number.

It is an amenable number.

57440313 is a deficient number, since it is larger than the sum of its proper divisors (39813447).

57440313 is a wasteful number, since it uses less digits than its factorization.

57440313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 303933 (or 303927 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 27.

The square root of 57440313 is about 7578.9387779557. The cubic root of 57440313 is about 385.8385343988.

Adding to 57440313 its reverse (31304475), we get a palindrome (88744788).

The spelling of 57440313 in words is "fifty-seven million, four hundred forty thousand, three hundred thirteen".