51105632551 has 2 divisors, whose sum is σ = 51105632552. Its totient is φ = 51105632550.

The previous prime is 51105632537. The next prime is 51105632629. The reversal of 51105632551 is 15523650115.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51105632551 - 2¹³ = 51105624359 is a prime.

It is a super-2 number, since 2×51105632551² (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 (51105632051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25552816275 + 25552816276.

It is an arithmetic number, because the mean of its divisors is an integer number (25552816276).

Almost surely, 2^51105632551 is an apocalyptic number.

51105632551 is a deficient number, since it is larger than the sum of its proper divisors (1).

51105632551 is an equidigital number, since it uses as much as digits as its factorization.

51105632551 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 22500, while the sum is 34.

The spelling of 51105632551 in words is "fifty-one billion, one hundred five million, six hundred thirty-two thousand, five hundred fifty-one".