51110317549 has 2 divisors, whose sum is σ = 51110317550. Its totient is φ = 51110317548.

The previous prime is 51110317541. The next prime is 51110317553. The reversal of 51110317549 is 94571301115.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 46952389225 + 4157928324 = 216685^2 + 64482^2 .

It is a cyclic number.

It is not a de Polignac number, because 51110317549 - 2³ = 51110317541 is a prime.

It is a super-2 number, since 2×51110317549² (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 (51110317541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25555158774 + 25555158775.

It is an arithmetic number, because the mean of its divisors is an integer number (25555158775).

Almost surely, 2^51110317549 is an apocalyptic number.

It is an amenable number.

51110317549 is a deficient number, since it is larger than the sum of its proper divisors (1).

51110317549 is an equidigital number, since it uses as much as digits as its factorization.

51110317549 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18900, while the sum is 37.

The spelling of 51110317549 in words is "fifty-one billion, one hundred ten million, three hundred seventeen thousand, five hundred forty-nine".