51223021125 has 128 divisors (see below), whose sum is σ = 90724368384. Its totient is φ = 25613280000.

The previous prime is 51223021097. The next prime is 51223021127. The reversal of 51223021125 is 52112032215.

It is not a de Polignac number, because 51223021125 - 2⁷ = 51223020997 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51223021095 and 51223021104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51223021127) 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 127 ways as a sum of consecutive naturals, for example, 110632644 + ... + 110633106.

It is an arithmetic number, because the mean of its divisors is an integer number (708784128).

Almost surely, 2^51223021125 is an apocalyptic number.

It is an amenable number.

51223021125 is a deficient number, since it is larger than the sum of its proper divisors (39501347259).

51223021125 is a wasteful number, since it uses less digits than its factorization.

51223021125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 732 (or 722 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 24.

The spelling of 51223021125 in words is "fifty-one billion, two hundred twenty-three million, twenty-one thousand, one hundred twenty-five".