51550111253 has 2 divisors, whose sum is σ = 51550111254. Its totient is φ = 51550111252.

The previous prime is 51550111157. The next prime is 51550111321. The reversal of 51550111253 is 35211105515.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 49034787844 + 2515323409 = 221438^2 + 50153^2 .

It is a cyclic number.

It is not a de Polignac number, because 51550111253 - 2¹⁰ = 51550110229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51550119253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25775055626 + 25775055627.

It is an arithmetic number, because the mean of its divisors is an integer number (25775055627).

Almost surely, 2^51550111253 is an apocalyptic number.

It is an amenable number.

51550111253 is a deficient number, since it is larger than the sum of its proper divisors (1).

51550111253 is an equidigital number, since it uses as much as digits as its factorization.

51550111253 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3750, while the sum is 29.

Adding to 51550111253 its reverse (35211105515), we get a palindrome (86761216768).

The spelling of 51550111253 in words is "fifty-one billion, five hundred fifty million, one hundred eleven thousand, two hundred fifty-three".