51212326 has 16 divisors (see below), whose sum is σ = 84409920. Its totient is φ = 23109480.

The previous prime is 51212311. The next prime is 51212327. The reversal of 51212326 is 62321215.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 51212297 and 51212306.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51212327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5316 + ... + 11431.

It is an arithmetic number, because the mean of its divisors is an integer number (5275620).

Almost surely, 2^51212326 is an apocalyptic number.

51212326 is a deficient number, since it is larger than the sum of its proper divisors (33197594).

51212326 is a wasteful number, since it uses less digits than its factorization.

51212326 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16899.

The product of its digits is 720, while the sum is 22.

The square root of 51212326 is about 7156.2787816015. The cubic root of 51212326 is about 371.3569023314.

Subtracting 51212326 from its reverse (62321215), we obtain a square (11108889 = 3333²).

It can be divided in two parts, 5121 and 2326, that added together give a palindrome (7447).

The spelling of 51212326 in words is "fifty-one million, two hundred twelve thousand, three hundred twenty-six".