57327421 has 2 divisors, whose sum is σ = 57327422. Its totient is φ = 57327420.

The previous prime is 57327379. The next prime is 57327443. The reversal of 57327421 is 12472375.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 35105625 + 22221796 = 5925^2 + 4714^2 .

It is a cyclic number.

It is not a de Polignac number, because 57327421 - 2⁹ = 57326909 is a prime.

It is a super-2 number, since 2×57327421² = 6572866397022482, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57327521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28663710 + 28663711.

It is an arithmetic number, because the mean of its divisors is an integer number (28663711).

Almost surely, 2^57327421 is an apocalyptic number.

It is an amenable number.

57327421 is a deficient number, since it is larger than the sum of its proper divisors (1).

57327421 is an equidigital number, since it uses as much as digits as its factorization.

57327421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11760, while the sum is 31.

The square root of 57327421 is about 7571.4873703916. The cubic root of 57327421 is about 385.5855956014.

Adding to 57327421 its reverse (12472375), we get a palindrome (69799796).

The spelling of 57327421 in words is "fifty-seven million, three hundred twenty-seven thousand, four hundred twenty-one".