15217254077 has 2 divisors, whose sum is σ = 15217254078. Its totient is φ = 15217254076.

The previous prime is 15217254011. The next prime is 15217254079. The reversal of 15217254077 is 77045271251.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14374571236 + 842682841 = 119894^2 + 29029^2 .

It is a cyclic number.

It is not a de Polignac number, because 15217254077 - 2¹⁰ = 15217253053 is a prime.

Together with 15217254079, 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 (15217254079) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7608627038 + 7608627039.

It is an arithmetic number, because the mean of its divisors is an integer number (7608627039).

Almost surely, 2^15217254077 is an apocalyptic number.

It is an amenable number.

15217254077 is a deficient number, since it is larger than the sum of its proper divisors (1).

15217254077 is an equidigital number, since it uses as much as digits as its factorization.

15217254077 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 137200, while the sum is 41.

The spelling of 15217254077 in words is "fifteen billion, two hundred seventeen million, two hundred fifty-four thousand, seventy-seven".