51226242041521 has 4 divisors (see below), whose sum is σ = 51228903302500. Its totient is φ = 51223580780544.

The previous prime is 51226242041437. The next prime is 51226242041581. The reversal of 51226242041521 is 12514024262215.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 24713217195121 + 26513024846400 = 4971239^2 + 5149080^2 .

It is a cyclic number.

It is not a de Polignac number, because 51226242041521 - 2¹⁷ = 51226241910449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51226242041581) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1330601616 + ... + 1330640113.

It is an arithmetic number, because the mean of its divisors is an integer number (12807225825625).

Almost surely, 2^{51226242041521} is an apocalyptic number.

It is an amenable number.

51226242041521 is a deficient number, since it is larger than the sum of its proper divisors (2661260979).

51226242041521 is a wasteful number, since it uses less digits than its factorization.

51226242041521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2661260978.

The product of its (nonzero) digits is 76800, while the sum is 37.

The spelling of 51226242041521 in words is "fifty-one trillion, two hundred twenty-six billion, two hundred forty-two million, forty-one thousand, five hundred twenty-one".