51402354281 has 2 divisors, whose sum is σ = 51402354282. Its totient is φ = 51402354280.

The previous prime is 51402354277. The next prime is 51402354329. The reversal of 51402354281 is 18245320415.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 36704429056 + 14697925225 = 191584^2 + 121235^2 .

It is a cyclic number.

It is not a de Polignac number, because 51402354281 - 2² = 51402354277 is a prime.

It is a super-2 number, since 2×51402354281² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (51402354221) 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, 25701177140 + 25701177141.

It is an arithmetic number, because the mean of its divisors is an integer number (25701177141).

Almost surely, 2^51402354281 is an apocalyptic number.

It is an amenable number.

51402354281 is a deficient number, since it is larger than the sum of its proper divisors (1).

51402354281 is an equidigital number, since it uses as much as digits as its factorization.

51402354281 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 38400, while the sum is 35.

Adding to 51402354281 its reverse (18245320415), we get a palindrome (69647674696).

The spelling of 51402354281 in words is "fifty-one billion, four hundred two million, three hundred fifty-four thousand, two hundred eighty-one".