52857481 has 2 divisors, whose sum is σ = 52857482. Its totient is φ = 52857480.

The previous prime is 52857461. The next prime is 52857491. The reversal of 52857481 is 18475825.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27657081 + 25200400 = 5259^2 + 5020^2 .

It is a cyclic number.

It is not a de Polignac number, because 52857481 - 2⁷ = 52857353 is a prime.

It is a super-2 number, since 2×52857481² = 5587826595330722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (52857421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26428740 + 26428741.

It is an arithmetic number, because the mean of its divisors is an integer number (26428741).

Almost surely, 2^52857481 is an apocalyptic number.

It is an amenable number.

52857481 is a deficient number, since it is larger than the sum of its proper divisors (1).

52857481 is an equidigital number, since it uses as much as digits as its factorization.

52857481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 89600, while the sum is 40.

The square root of 52857481 is about 7270.3150550715. The cubic root of 52857481 is about 375.2915800389.

The spelling of 52857481 in words is "fifty-two million, eight hundred fifty-seven thousand, four hundred eighty-one".