51294329 has 4 divisors (see below), whose sum is σ = 52059984. Its totient is φ = 50528676.

The previous prime is 51294317. The next prime is 51294337. The reversal of 51294329 is 92349215.

51294329 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 51294329 - 2⁸ = 51294073 is a prime.

It is a super-2 number, since 2×51294329² = 5262216375120482, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51294379) 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, 382727 + ... + 382860.

It is an arithmetic number, because the mean of its divisors is an integer number (13014996).

Almost surely, 2^51294329 is an apocalyptic number.

It is an amenable number.

51294329 is a deficient number, since it is larger than the sum of its proper divisors (765655).

51294329 is an equidigital number, since it uses as much as digits as its factorization.

51294329 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 765654.

The product of its digits is 19440, while the sum is 35.

The square root of 51294329 is about 7162.0059340942. The cubic root of 51294329 is about 371.5550065970. Note that the first 3 decimals are identical.

The spelling of 51294329 in words is "fifty-one million, two hundred ninety-four thousand, three hundred twenty-nine".