51110317553 has 2 divisors, whose sum is σ = 51110317554. Its totient is φ = 51110317552.

The previous prime is 51110317549. The next prime is 51110317561. The reversal of 51110317553 is 35571301115.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 32278793569 + 18831523984 = 179663^2 + 137228^2 .

It is a cyclic number.

It is not a de Polignac number, because 51110317553 - 2² = 51110317549 is a prime.

It is a super-2 number, since 2×51110317553² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (51110377553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25555158776 + 25555158777.

It is an arithmetic number, because the mean of its divisors is an integer number (25555158777).

Almost surely, 2^51110317553 is an apocalyptic number.

It is an amenable number.

51110317553 is a deficient number, since it is larger than the sum of its proper divisors (1).

51110317553 is an equidigital number, since it uses as much as digits as its factorization.

51110317553 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7875, while the sum is 32.

Adding to 51110317553 its reverse (35571301115), we get a palindrome (86681618668).

The spelling of 51110317553 in words is "fifty-one billion, one hundred ten million, three hundred seventeen thousand, five hundred fifty-three".