51545515451 has 2 divisors, whose sum is σ = 51545515452. Its totient is φ = 51545515450.

The previous prime is 51545515429. The next prime is 51545515531. The reversal of 51545515451 is 15451554515.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51545515451 - 2⁶ = 51545515387 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51545515399 and 51545515408.

It is not a weakly prime, because it can be changed into another prime (51545515421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25772757725 + 25772757726.

It is an arithmetic number, because the mean of its divisors is an integer number (25772757726).

Almost surely, 2^51545515451 is an apocalyptic number.

51545515451 is a deficient number, since it is larger than the sum of its proper divisors (1).

51545515451 is an equidigital number, since it uses as much as digits as its factorization.

51545515451 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 250000, while the sum is 41.

The spelling of 51545515451 in words is "fifty-one billion, five hundred forty-five million, five hundred fifteen thousand, four hundred fifty-one".