51656565151 has 2 divisors, whose sum is σ = 51656565152. Its totient is φ = 51656565150.

The previous prime is 51656565139. The next prime is 51656565197. The reversal of 51656565151 is 15156565615.

It is a happy number.

51656565151 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an a-pointer prime, because the next prime (51656565197) can be obtained adding 51656565151 to its sum of digits (46).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51656565151 - 2⁵ = 51656565119 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51656565101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25828282575 + 25828282576.

It is an arithmetic number, because the mean of its divisors is an integer number (25828282576).

Almost surely, 2^51656565151 is an apocalyptic number.

51656565151 is a deficient number, since it is larger than the sum of its proper divisors (1).

51656565151 is an equidigital number, since it uses as much as digits as its factorization.

51656565151 is an evil number, because the sum of its binary digits is even.

The product of its digits is 675000, while the sum is 46.

The spelling of 51656565151 in words is "fifty-one billion, six hundred fifty-six million, five hundred sixty-five thousand, one hundred fifty-one".