51397202051 has 16 divisors (see below), whose sum is σ = 55519759680. Its totient is φ = 47298954240.

The previous prime is 51397202047. The next prime is 51397202113. The reversal of 51397202051 is 15020279315.

It is a cyclic number.

It is not a de Polignac number, because 51397202051 - 2² = 51397202047 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51397202851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9819131 + ... + 9824363.

It is an arithmetic number, because the mean of its divisors is an integer number (3469984980).

Almost surely, 2^51397202051 is an apocalyptic number.

51397202051 is a deficient number, since it is larger than the sum of its proper divisors (4122557629).

51397202051 is a wasteful number, since it uses less digits than its factorization.

51397202051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7406.

The product of its (nonzero) digits is 18900, while the sum is 35.

The spelling of 51397202051 in words is "fifty-one billion, three hundred ninety-seven million, two hundred two thousand, fifty-one".