51445214251 has 2 divisors, whose sum is σ = 51445214252. Its totient is φ = 51445214250.

The previous prime is 51445214239. The next prime is 51445214341. The reversal of 51445214251 is 15241254415.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51445214251 - 2⁷ = 51445214123 is a prime.

It is a super-2 number, since 2×51445214251² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (51445214221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25722607125 + 25722607126.

It is an arithmetic number, because the mean of its divisors is an integer number (25722607126).

Almost surely, 2^51445214251 is an apocalyptic number.

51445214251 is a deficient number, since it is larger than the sum of its proper divisors (1).

51445214251 is an equidigital number, since it uses as much as digits as its factorization.

51445214251 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 32000, while the sum is 34.

Adding to 51445214251 its reverse (15241254415), we get a palindrome (66686468666).

The spelling of 51445214251 in words is "fifty-one billion, four hundred forty-five million, two hundred fourteen thousand, two hundred fifty-one".