51521245099 has 2 divisors, whose sum is σ = 51521245100. Its totient is φ = 51521245098.

The previous prime is 51521245093. The next prime is 51521245141. The reversal of 51521245099 is 99054212515.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51521245099 - 2⁵ = 51521245067 is a prime.

It is not a weakly prime, because it can be changed into another prime (51521245093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25760622549 + 25760622550.

It is an arithmetic number, because the mean of its divisors is an integer number (25760622550).

Almost surely, 2^51521245099 is an apocalyptic number.

51521245099 is a deficient number, since it is larger than the sum of its proper divisors (1).

51521245099 is an equidigital number, since it uses as much as digits as its factorization.

51521245099 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 162000, while the sum is 43.

The spelling of 51521245099 in words is "fifty-one billion, five hundred twenty-one million, two hundred forty-five thousand, ninety-nine".