51725866 has 16 divisors (see below), whose sum is σ = 86477760. Its totient is φ = 23060160.

The previous prime is 51725851. The next prime is 51725867. The reversal of 51725866 is 66852715.

It is a super-4 number, since 4×51725866⁴ (a number of 32 digits) contains 4444 as substring.

It is not an unprimeable number, because it can be changed into a prime (51725867) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39390 + ... + 40681.

It is an arithmetic number, because the mean of its divisors is an integer number (5404860).

Almost surely, 2^51725866 is an apocalyptic number.

51725866 is a deficient number, since it is larger than the sum of its proper divisors (34751894).

51725866 is a wasteful number, since it uses less digits than its factorization.

51725866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80109.

The product of its digits is 100800, while the sum is 40.

The square root of 51725866 is about 7192.0696603968. The cubic root of 51725866 is about 372.5940569955.

The spelling of 51725866 in words is "fifty-one million, seven hundred twenty-five thousand, eight hundred sixty-six".