253355515435081 has 2 divisors, whose sum is σ = 253355515435082. Its totient is φ = 253355515435080.

The previous prime is 253355515435079. The next prime is 253355515435133. The reversal of 253355515435081 is 180534515553352.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 209548206608400 + 43807308826681 = 14475780^2 + 6618709^2 .

It is a cyclic number.

It is not a de Polignac number, because 253355515435081 - 2¹ = 253355515435079 is a prime.

It is a super-2 number, since 2×253355515435081² (a number of 30 digits) contains 22 as substring.

Together with 253355515435079, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (253355515415081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126677757717540 + 126677757717541.

It is an arithmetic number, because the mean of its divisors is an integer number (126677757717541).

Almost surely, 2^{253355515435081} is an apocalyptic number.

It is an amenable number.

253355515435081 is a deficient number, since it is larger than the sum of its proper divisors (1).

253355515435081 is an equidigital number, since it uses as much as digits as its factorization.

253355515435081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27000000, while the sum is 55.

The spelling of 253355515435081 in words is "two hundred fifty-three trillion, three hundred fifty-five billion, five hundred fifteen million, four hundred thirty-five thousand, eighty-one".