51098458381 has 2 divisors, whose sum is σ = 51098458382. Its totient is φ = 51098458380.

The previous prime is 51098458379. The next prime is 51098458457. The reversal of 51098458381 is 18385489015.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 33111625156 + 17986833225 = 181966^2 + 134115^2 .

It is a cyclic number.

It is not a de Polignac number, because 51098458381 - 2¹ = 51098458379 is a prime.

It is a super-2 number, since 2×51098458381² (a number of 22 digits) contains 22 as substring.

Together with 51098458379, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51098458681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25549229190 + 25549229191.

It is an arithmetic number, because the mean of its divisors is an integer number (25549229191).

Almost surely, 2^51098458381 is an apocalyptic number.

It is an amenable number.

51098458381 is a deficient number, since it is larger than the sum of its proper divisors (1).

51098458381 is an equidigital number, since it uses as much as digits as its factorization.

51098458381 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1382400, while the sum is 52.

The spelling of 51098458381 in words is "fifty-one billion, ninety-eight million, four hundred fifty-eight thousand, three hundred eighty-one".