51009786 has 24 divisors (see below), whose sum is σ = 112335444. Its totient is φ = 16724160.

The previous prime is 51009779. The next prime is 51009799. The reversal of 51009786 is 68790015.

51009786 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 50339025 + 670761 = 7095^2 + 819^2 .

It is a super-3 number, since 3×51009786³ (a number of 24 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 51009786.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22131 + ... + 24326.

Almost surely, 2^51009786 is an apocalyptic number.

51009786 is an abundant number, since it is smaller than the sum of its proper divisors (61325658).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51009786 is a wasteful number, since it uses less digits than its factorization.

51009786 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46526 (or 46523 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 36.

The square root of 51009786 is about 7142.1135527237. The cubic root of 51009786 is about 370.8666948173.

The spelling of 51009786 in words is "fifty-one million, nine thousand, seven hundred eighty-six".