51125786 has 8 divisors (see below), whose sum is σ = 78761460. Its totient is φ = 24871968.

The previous prime is 51125779. The next prime is 51125807. The reversal of 51125786 is 68752115.

It can be written as a sum of positive squares in 2 ways, for example, as 43970161 + 7155625 = 6631^2 + 2675^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×51125786² = 5227691988235592, which contains 22 as substring.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 345371 + ... + 345518.

Almost surely, 2^51125786 is an apocalyptic number.

51125786 is a deficient number, since it is larger than the sum of its proper divisors (27635674).

51125786 is a wasteful number, since it uses less digits than its factorization.

51125786 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 690928.

The product of its digits is 16800, while the sum is 35.

The square root of 51125786 is about 7150.2297865174. The cubic root of 51125786 is about 371.1476080204.

The spelling of 51125786 in words is "fifty-one million, one hundred twenty-five thousand, seven hundred eighty-six".