51432279 has 4 divisors (see below), whose sum is σ = 68576376. Its totient is φ = 34288184.

The previous prime is 51432263. The next prime is 51432281. The reversal of 51432279 is 97223415.

51432279 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 51432279 - 2⁴ = 51432263 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51432229) 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, 8572044 + ... + 8572049.

It is an arithmetic number, because the mean of its divisors is an integer number (17144094).

Almost surely, 2^51432279 is an apocalyptic number.

51432279 is a deficient number, since it is larger than the sum of its proper divisors (17144097).

51432279 is a wasteful number, since it uses less digits than its factorization.

51432279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17144096.

The product of its digits is 15120, while the sum is 33.

The square root of 51432279 is about 7171.6301494151. The cubic root of 51432279 is about 371.8877927854.

The spelling of 51432279 in words is "fifty-one million, four hundred thirty-two thousand, two hundred seventy-nine".