51123553225 has 24 divisors (see below), whose sum is σ = 65315105280. Its totient is φ = 39674315520.

The previous prime is 51123553199. The next prime is 51123553237. The reversal of 51123553225 is 52235532115.

It is not a de Polignac number, because 51123553225 - 2¹⁹ = 51123028937 is a prime.

It is a super-2 number, since 2×51123553225² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 59745 + ... + 325294.

It is an arithmetic number, because the mean of its divisors is an integer number (2721462720).

Almost surely, 2^51123553225 is an apocalyptic number.

It is an amenable number.

51123553225 is a deficient number, since it is larger than the sum of its proper divisors (14191552055).

51123553225 is a wasteful number, since it uses less digits than its factorization.

51123553225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 385209 (or 385204 counting only the distinct ones).

The product of its digits is 45000, while the sum is 34.

The spelling of 51123553225 in words is "fifty-one billion, one hundred twenty-three million, five hundred fifty-three thousand, two hundred twenty-five".