51323279 has 4 divisors (see below), whose sum is σ = 58655184. Its totient is φ = 43991376.

The previous prime is 51323269. The next prime is 51323287. The reversal of 51323279 is 97232315.

51323279 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.

It is a cyclic number.

It is not a de Polignac number, because 51323279 - 2⁴ = 51323263 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51323269) 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, 3665942 + ... + 3665955.

It is an arithmetic number, because the mean of its divisors is an integer number (14663796).

Almost surely, 2^51323279 is an apocalyptic number.

51323279 is a deficient number, since it is larger than the sum of its proper divisors (7331905).

51323279 is an equidigital number, since it uses as much as digits as its factorization.

51323279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7331904.

The product of its digits is 11340, while the sum is 32.

The square root of 51323279 is about 7164.0267308267. The cubic root of 51323279 is about 371.6248940788.

The spelling of 51323279 in words is "fifty-one million, three hundred twenty-three thousand, two hundred seventy-nine".