51154555021441 has 2 divisors, whose sum is σ = 51154555021442. Its totient is φ = 51154555021440.

The previous prime is 51154555021387. The next prime is 51154555021459. The reversal of 51154555021441 is 14412055545115.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 51146512519041 + 8042502400 = 7151679^2 + 89680^2 .

It is a cyclic number.

It is not a de Polignac number, because 51154555021441 - 2²¹ = 51154552924289 is a prime.

It is not a weakly prime, because it can be changed into another prime (51154555021541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25577277510720 + 25577277510721.

It is an arithmetic number, because the mean of its divisors is an integer number (25577277510721).

Almost surely, 2^{51154555021441} is an apocalyptic number.

It is an amenable number.

51154555021441 is a deficient number, since it is larger than the sum of its proper divisors (1).

51154555021441 is an equidigital number, since it uses as much as digits as its factorization.

51154555021441 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 400000, while the sum is 43.

The spelling of 51154555021441 in words is "fifty-one trillion, one hundred fifty-four billion, five hundred fifty-five million, twenty-one thousand, four hundred forty-one".