51151002173 has 2 divisors, whose sum is σ = 51151002174. Its totient is φ = 51151002172.

The previous prime is 51151002073. The next prime is 51151002241. The reversal of 51151002173 is 37120015115.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 49694663929 + 1456338244 = 222923^2 + 38162^2 .

It is a cyclic number.

It is not a de Polignac number, because 51151002173 - 2⁸ = 51151001917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51151002073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25575501086 + 25575501087.

It is an arithmetic number, because the mean of its divisors is an integer number (25575501087).

Almost surely, 2^51151002173 is an apocalyptic number.

It is an amenable number.

51151002173 is a deficient number, since it is larger than the sum of its proper divisors (1).

51151002173 is an equidigital number, since it uses as much as digits as its factorization.

51151002173 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1050, while the sum is 26.

Adding to 51151002173 its reverse (37120015115), we get a palindrome (88271017288).

The spelling of 51151002173 in words is "fifty-one billion, one hundred fifty-one million, two thousand, one hundred seventy-three".