51155450113 has 2 divisors, whose sum is σ = 51155450114. Its totient is φ = 51155450112.

The previous prime is 51155450077. The next prime is 51155450117. The reversal of 51155450113 is 31105455115.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38037871089 + 13117579024 = 195033^2 + 114532^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51155450113 is a prime.

It is not a weakly prime, because it can be changed into another prime (51155450117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25577725056 + 25577725057.

It is an arithmetic number, because the mean of its divisors is an integer number (25577725057).

Almost surely, 2^51155450113 is an apocalyptic number.

It is an amenable number.

51155450113 is a deficient number, since it is larger than the sum of its proper divisors (1).

51155450113 is an equidigital number, since it uses as much as digits as its factorization.

51155450113 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7500, while the sum is 31.

The spelling of 51155450113 in words is "fifty-one billion, one hundred fifty-five million, four hundred fifty thousand, one hundred thirteen".