51263506267 has 2 divisors, whose sum is σ = 51263506268. Its totient is φ = 51263506266.

The previous prime is 51263506243. The next prime is 51263506279. The reversal of 51263506267 is 76260536215.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51263506267 is a prime.

It is not a weakly prime, because it can be changed into another prime (51263506667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25631753133 + 25631753134.

It is an arithmetic number, because the mean of its divisors is an integer number (25631753134).

Almost surely, 2^51263506267 is an apocalyptic number.

51263506267 is a deficient number, since it is larger than the sum of its proper divisors (1).

51263506267 is an equidigital number, since it uses as much as digits as its factorization.

51263506267 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 453600, while the sum is 43.

The spelling of 51263506267 in words is "fifty-one billion, two hundred sixty-three million, five hundred six thousand, two hundred sixty-seven".