51279049 has 4 divisors (see below), whose sum is σ = 51483600. Its totient is φ = 51074500.

The previous prime is 51279023. The next prime is 51279113. The reversal of 51279049 is 94097215.

51279049 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 51279049 - 2⁵ = 51279017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51278999 and 51279017.

It is not an unprimeable number, because it can be changed into a prime (51279649) 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 3 ways as a sum of consecutive naturals, for example, 101899 + ... + 102400.

It is an arithmetic number, because the mean of its divisors is an integer number (12870900).

Almost surely, 2^51279049 is an apocalyptic number.

It is an amenable number.

51279049 is a deficient number, since it is larger than the sum of its proper divisors (204551).

51279049 is a wasteful number, since it uses less digits than its factorization.

51279049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204550.

The product of its (nonzero) digits is 22680, while the sum is 37.

The square root of 51279049 is about 7160.9391143900. The cubic root of 51279049 is about 371.5181089227.

The spelling of 51279049 in words is "fifty-one million, two hundred seventy-nine thousand, forty-nine".