57421543 has 2 divisors, whose sum is σ = 57421544. Its totient is φ = 57421542.

The previous prime is 57421541. The next prime is 57421577. The reversal of 57421543 is 34512475.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 57421543 - 2¹ = 57421541 is a prime.

Together with 57421541, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57421541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28710771 + 28710772.

It is an arithmetic number, because the mean of its divisors is an integer number (28710772).

Almost surely, 2^57421543 is an apocalyptic number.

57421543 is a deficient number, since it is larger than the sum of its proper divisors (1).

57421543 is an equidigital number, since it uses as much as digits as its factorization.

57421543 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16800, while the sum is 31.

The square root of 57421543 is about 7577.7003767634. The cubic root of 57421543 is about 385.7965024882.

The spelling of 57421543 in words is "fifty-seven million, four hundred twenty-one thousand, five hundred forty-three".