51278326 has 8 divisors (see below), whose sum is σ = 83910024. Its totient is φ = 23308320.

The previous prime is 51278323. The next prime is 51278327. The reversal of 51278326 is 62387215.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 51278291 and 51278300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51278323) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1165395 + ... + 1165438.

It is an arithmetic number, because the mean of its divisors is an integer number (10488753).

Almost surely, 2^51278326 is an apocalyptic number.

51278326 is a deficient number, since it is larger than the sum of its proper divisors (32631698).

51278326 is a wasteful number, since it uses less digits than its factorization.

51278326 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2330846.

The product of its digits is 20160, while the sum is 34.

The square root of 51278326 is about 7160.8886320065. Note that the first 3 decimals coincide. The cubic root of 51278326 is about 371.5163628629.

Subtracting 51278326 from its reverse (62387215), we obtain a square (11108889 = 3333²).

The spelling of 51278326 in words is "fifty-one million, two hundred seventy-eight thousand, three hundred twenty-six".