50355332581 has 2 divisors, whose sum is σ = 50355332582. Its totient is φ = 50355332580.

The previous prime is 50355332561. The next prime is 50355332633. The reversal of 50355332581 is 18523355305.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38040991681 + 12314340900 = 195041^2 + 110970^2 .

It is a cyclic number.

It is not a de Polignac number, because 50355332581 - 2¹¹ = 50355330533 is a prime.

It is a super-2 number, since 2×50355332581² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (50355332561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25177666290 + 25177666291.

It is an arithmetic number, because the mean of its divisors is an integer number (25177666291).

Almost surely, 2^50355332581 is an apocalyptic number.

It is an amenable number.

50355332581 is a deficient number, since it is larger than the sum of its proper divisors (1).

50355332581 is an equidigital number, since it uses as much as digits as its factorization.

50355332581 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 270000, while the sum is 40.

Adding to 50355332581 its reverse (18523355305), we get a palindrome (68878687886).

The spelling of 50355332581 in words is "fifty billion, three hundred fifty-five million, three hundred thirty-two thousand, five hundred eighty-one".