53117267447 has 2 divisors, whose sum is σ = 53117267448. Its totient is φ = 53117267446.

The previous prime is 53117267443. The next prime is 53117267449. The reversal of 53117267447 is 74476271135.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 53117267447 - 2² = 53117267443 is a prime.

It is a super-2 number, since 2×53117267447² (a number of 22 digits) contains 22 as substring.

Together with 53117267449, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53117267443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26558633723 + 26558633724.

It is an arithmetic number, because the mean of its divisors is an integer number (26558633724).

Almost surely, 2^53117267447 is an apocalyptic number.

53117267447 is a deficient number, since it is larger than the sum of its proper divisors (1).

53117267447 is an equidigital number, since it uses as much as digits as its factorization.

53117267447 is an evil number, because the sum of its binary digits is even.

The product of its digits is 987840, while the sum is 47.

The spelling of 53117267447 in words is "fifty-three billion, one hundred seventeen million, two hundred sixty-seven thousand, four hundred forty-seven".