51631280251 has 2 divisors, whose sum is σ = 51631280252. Its totient is φ = 51631280250.

The previous prime is 51631280209. The next prime is 51631280273. The reversal of 51631280251 is 15208213615.

51631280251 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51631280251 - 2⁷ = 51631280123 is a prime.

It is not a weakly prime, because it can be changed into another prime (51631287251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25815640125 + 25815640126.

It is an arithmetic number, because the mean of its divisors is an integer number (25815640126).

Almost surely, 2^51631280251 is an apocalyptic number.

51631280251 is a deficient number, since it is larger than the sum of its proper divisors (1).

51631280251 is an equidigital number, since it uses as much as digits as its factorization.

51631280251 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14400, while the sum is 34.

Adding to 51631280251 its reverse (15208213615), we get a palindrome (66839493866).

The spelling of 51631280251 in words is "fifty-one billion, six hundred thirty-one million, two hundred eighty thousand, two hundred fifty-one".