57521306903 has 2 divisors, whose sum is σ = 57521306904. Its totient is φ = 57521306902.

The previous prime is 57521306833. The next prime is 57521306917. The reversal of 57521306903 is 30960312575.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-57521306903 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57521306203) 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, 28760653451 + 28760653452.

It is an arithmetic number, because the mean of its divisors is an integer number (28760653452).

Almost surely, 2^57521306903 is an apocalyptic number.

57521306903 is a deficient number, since it is larger than the sum of its proper divisors (1).

57521306903 is an equidigital number, since it uses as much as digits as its factorization.

57521306903 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 170100, while the sum is 41.

The spelling of 57521306903 in words is "fifty-seven billion, five hundred twenty-one million, three hundred six thousand, nine hundred three".