57671521 has 2 divisors, whose sum is σ = 57671522. Its totient is φ = 57671520.

The previous prime is 57671513. The next prime is 57671539. The reversal of 57671521 is 12517675.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 37957921 + 19713600 = 6161^2 + 4440^2 .

It is a cyclic number.

It is not a de Polignac number, because 57671521 - 2³ = 57671513 is a prime.

It is not a weakly prime, because it can be changed into another prime (57671321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28835760 + 28835761.

It is an arithmetic number, because the mean of its divisors is an integer number (28835761).

Almost surely, 2^57671521 is an apocalyptic number.

57671521 is the 4385-th hex number.

It is an amenable number.

57671521 is a deficient number, since it is larger than the sum of its proper divisors (1).

57671521 is an equidigital number, since it uses as much as digits as its factorization.

57671521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14700, while the sum is 34.

The square root of 57671521 is about 7594.1767822457. The cubic root of 57671521 is about 386.3555320955.

The spelling of 57671521 in words is "fifty-seven million, six hundred seventy-one thousand, five hundred twenty-one".