57453821 has 2 divisors, whose sum is σ = 57453822. Its totient is φ = 57453820.

The previous prime is 57453769. The next prime is 57453841. The reversal of 57453821 is 12835475.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40322500 + 17131321 = 6350^2 + 4139^2 .

It is a cyclic number.

It is not a de Polignac number, because 57453821 - 2²² = 53259517 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57453841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28726910 + 28726911.

It is an arithmetic number, because the mean of its divisors is an integer number (28726911).

Almost surely, 2^57453821 is an apocalyptic number.

It is an amenable number.

57453821 is a deficient number, since it is larger than the sum of its proper divisors (1).

57453821 is an equidigital number, since it uses as much as digits as its factorization.

57453821 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 33600, while the sum is 35.

The square root of 57453821 is about 7579.8298793575. The cubic root of 57453821 is about 385.8687773771.

The spelling of 57453821 in words is "fifty-seven million, four hundred fifty-three thousand, eight hundred twenty-one".