51023510251 has 16 divisors (see below), whose sum is σ = 58630809600. Its totient is φ = 43495958880.

The previous prime is 51023510249. The next prime is 51023510261. The reversal of 51023510251 is 15201532015.

It is a cyclic number.

It is not a de Polignac number, because 51023510251 - 2¹ = 51023510249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51023510261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3945486 + ... + 3958396.

It is an arithmetic number, because the mean of its divisors is an integer number (3664425600).

Almost surely, 2^51023510251 is an apocalyptic number.

51023510251 is a deficient number, since it is larger than the sum of its proper divisors (7607299349).

51023510251 is a wasteful number, since it uses less digits than its factorization.

51023510251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15954.

The product of its (nonzero) digits is 1500, while the sum is 25.

The spelling of 51023510251 in words is "fifty-one billion, twenty-three million, five hundred ten thousand, two hundred fifty-one".