51093817087 has 2 divisors, whose sum is σ = 51093817088. Its totient is φ = 51093817086.

The previous prime is 51093817039. The next prime is 51093817133. The reversal of 51093817087 is 78071839015.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51093817087 - 2²³ = 51085428479 is a prime.

It is a super-2 number, since 2×51093817087² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 51093817087.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51093817787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25546908543 + 25546908544.

It is an arithmetic number, because the mean of its divisors is an integer number (25546908544).

Almost surely, 2^51093817087 is an apocalyptic number.

51093817087 is a deficient number, since it is larger than the sum of its proper divisors (1).

51093817087 is an equidigital number, since it uses as much as digits as its factorization.

51093817087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 423360, while the sum is 49.

The spelling of 51093817087 in words is "fifty-one billion, ninety-three million, eight hundred seventeen thousand, eighty-seven".