52435531319981 has 2 divisors, whose sum is σ = 52435531319982. Its totient is φ = 52435531319980.

The previous prime is 52435531319921. The next prime is 52435531320017. The reversal of 52435531319981 is 18991313553425.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 50994309460900 + 1441221859081 = 7141030^2 + 1200509^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-52435531319981 is a prime.

It is a super-2 number, since 2×52435531319981² (a number of 28 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 52435531319981.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (52435531319921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26217765659990 + 26217765659991.

It is an arithmetic number, because the mean of its divisors is an integer number (26217765659991).

Almost surely, 2^{52435531319981} is an apocalyptic number.

It is an amenable number.

52435531319981 is a deficient number, since it is larger than the sum of its proper divisors (1).

52435531319981 is an equidigital number, since it uses as much as digits as its factorization.

52435531319981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17496000, while the sum is 59.

The spelling of 52435531319981 in words is "fifty-two trillion, four hundred thirty-five billion, five hundred thirty-one million, three hundred nineteen thousand, nine hundred eighty-one".