51968725 has 24 divisors (see below), whose sum is σ = 68254560. Its totient is φ = 39184320.

The previous prime is 51968717. The next prime is 51968731. The reversal of 51968725 is 52786915.

It is not a de Polignac number, because 51968725 - 2³ = 51968717 is a prime.

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a congruent number.

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, 30342 + ... + 32008.

It is an arithmetic number, because the mean of its divisors is an integer number (2843940).

Almost surely, 2^51968725 is an apocalyptic number.

It is an amenable number.

51968725 is a deficient number, since it is larger than the sum of its proper divisors (16285835).

51968725 is a wasteful number, since it uses less digits than its factorization.

51968725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1749 (or 1744 counting only the distinct ones).

The product of its digits is 151200, while the sum is 43.

The square root of 51968725 is about 7208.9336936887. The cubic root of 51968725 is about 373.1762710040.

The spelling of 51968725 in words is "fifty-one million, nine hundred sixty-eight thousand, seven hundred twenty-five".