57351321 has 10 divisors (see below), whose sum is σ = 85673082. Its totient is φ = 38234160.

The previous prime is 57351317. The next prime is 57351337. The reversal of 57351321 is 12315375.

It can be written as a sum of positive squares in only one way, i.e., 56475225 + 876096 = 7515^2 + 936^2 .

It is not a de Polignac number, because 57351321 - 2² = 57351317 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 (57351341) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 353940 + ... + 354101.

Almost surely, 2^57351321 is an apocalyptic number.

It is an amenable number.

57351321 is a deficient number, since it is larger than the sum of its proper divisors (28321761).

57351321 is an equidigital number, since it uses as much as digits as its factorization.

57351321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 708053 (or 708044 counting only the distinct ones).

The product of its digits is 3150, while the sum is 27.

The square root of 57351321 is about 7573.0654955573. The cubic root of 57351321 is about 385.6391721459.

Adding to 57351321 its reverse (12315375), we get a palindrome (69666696).

It can be divided in two parts, 5735 and 1321, that added together give a square (7056 = 84²).

The spelling of 57351321 in words is "fifty-seven million, three hundred fifty-one thousand, three hundred twenty-one".