51879009 has 32 divisors (see below), whose sum is σ = 85550080. Its totient is φ = 27231552.

The previous prime is 51879001. The next prime is 51879011. The reversal of 51879009 is 90097815.

It is a happy number.

51879009 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 51879009 - 2³ = 51879001 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

51879009 is a modest number, since divided by 9009 gives 5187 as remainder.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (51879001) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 83502 + ... + 84120.

It is an arithmetic number, because the mean of its divisors is an integer number (2673440).

Almost surely, 2^51879009 is an apocalyptic number.

It is an amenable number.

51879009 is a deficient number, since it is larger than the sum of its proper divisors (33671071).

51879009 is a wasteful number, since it uses less digits than its factorization.

51879009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 949.

The product of its (nonzero) digits is 22680, while the sum is 39.

The square root of 51879009 is about 7202.7084489100. The cubic root of 51879009 is about 372.9614035250.

It can be divided in two parts, 5187 and 9009, that added together give a triangular number (14196 = T₁₆₈).

The spelling of 51879009 in words is "fifty-one million, eight hundred seventy-nine thousand, nine".