51113342251 has 2 divisors, whose sum is σ = 51113342252. Its totient is φ = 51113342250.

The previous prime is 51113342239. The next prime is 51113342257. The reversal of 51113342251 is 15224331115.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51113342251 - 2¹³ = 51113334059 is a prime.

It is a super-2 number, since 2×51113342251² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (51113342257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25556671125 + 25556671126.

It is an arithmetic number, because the mean of its divisors is an integer number (25556671126).

Almost surely, 2^51113342251 is an apocalyptic number.

51113342251 is a deficient number, since it is larger than the sum of its proper divisors (1).

51113342251 is an equidigital number, since it uses as much as digits as its factorization.

51113342251 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3600, while the sum is 28.

Adding to 51113342251 its reverse (15224331115), we get a palindrome (66337673366).

The spelling of 51113342251 in words is "fifty-one billion, one hundred thirteen million, three hundred forty-two thousand, two hundred fifty-one".