52381010581 has 2 divisors, whose sum is σ = 52381010582. Its totient is φ = 52381010580.

The previous prime is 52381010573. The next prime is 52381010597. The reversal of 52381010581 is 18501018325.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 52185290481 + 195720100 = 228441^2 + 13990^2 .

It is a cyclic number.

It is not a de Polignac number, because 52381010581 - 2³ = 52381010573 is a prime.

It is a super-2 number, since 2×52381010581² (a number of 22 digits) contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (52381010531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26190505290 + 26190505291.

It is an arithmetic number, because the mean of its divisors is an integer number (26190505291).

Almost surely, 2^52381010581 is an apocalyptic number.

It is an amenable number.

52381010581 is a deficient number, since it is larger than the sum of its proper divisors (1).

52381010581 is an equidigital number, since it uses as much as digits as its factorization.

52381010581 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9600, while the sum is 34.

The spelling of 52381010581 in words is "fifty-two billion, three hundred eighty-one million, ten thousand, five hundred eighty-one".