51002620381 has 2 divisors, whose sum is σ = 51002620382. Its totient is φ = 51002620380.

The previous prime is 51002620351. The next prime is 51002620411. The reversal of 51002620381 is 18302620015.

It is a balanced prime because it is at equal distance from previous prime (51002620351) and next prime (51002620411).

It can be written as a sum of positive squares in only one way, i.e., 40615953156 + 10386667225 = 201534^2 + 101915^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51002620381 is a prime.

It is a super-2 number, since 2×51002620381² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51002620301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25501310190 + 25501310191.

It is an arithmetic number, because the mean of its divisors is an integer number (25501310191).

Almost surely, 2^51002620381 is an apocalyptic number.

It is an amenable number.

51002620381 is a deficient number, since it is larger than the sum of its proper divisors (1).

51002620381 is an equidigital number, since it uses as much as digits as its factorization.

51002620381 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2880, while the sum is 28.

The spelling of 51002620381 in words is "fifty-one billion, two million, six hundred twenty thousand, three hundred eighty-one".