51859775 has 24 divisors (see below), whose sum is σ = 74285424. Its totient is φ = 35494400.

The previous prime is 51859771. The next prime is 51859777. The reversal of 51859775 is 57795815.

It is a happy number.

It is not a de Polignac number, because 51859775 - 2² = 51859771 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51859771) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 872 + ... + 10221.

It is an arithmetic number, because the mean of its divisors is an integer number (3095226).

Almost surely, 2^51859775 is an apocalyptic number.

51859775 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

51859775 is a deficient number, since it is larger than the sum of its proper divisors (22425649).

51859775 is a wasteful number, since it uses less digits than its factorization.

51859775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11131 (or 11126 counting only the distinct ones).

The product of its digits is 441000, while the sum is 47.

The square root of 51859775 is about 7201.3731329518. The cubic root of 51859775 is about 372.9153063560.

The spelling of 51859775 in words is "fifty-one million, eight hundred fifty-nine thousand, seven hundred seventy-five".