51223388625 has 96 divisors (see below), whose sum is σ = 95782861824. Its totient is φ = 26308800000.

The previous prime is 51223388617. The next prime is 51223388639. The reversal of 51223388625 is 52688332215.

51223388625 is a `hidden beast` number, since 5 + 12 + 2 + 3 + 3 + 8 + 8 + 625 = 666.

It is not a de Polignac number, because 51223388625 - 2³ = 51223388617 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 7355145 + ... + 7362105.

It is an arithmetic number, because the mean of its divisors is an integer number (997738144).

Almost surely, 2^51223388625 is an apocalyptic number.

It is an amenable number.

51223388625 is a deficient number, since it is larger than the sum of its proper divisors (44559473199).

51223388625 is a wasteful number, since it uses less digits than its factorization.

51223388625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7224 (or 7211 counting only the distinct ones).

The product of its digits is 691200, while the sum is 45.

The spelling of 51223388625 in words is "fifty-one billion, two hundred twenty-three million, three hundred eighty-eight thousand, six hundred twenty-five".