51643326 has 64 divisors (see below), whose sum is σ = 124259328. Its totient is φ = 13989888.

The previous prime is 51643321. The next prime is 51643343. The reversal of 51643326 is 62334615.

It is a junction number, because it is equal to n+sod(n) for n = 51643293 and 51643302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51643321) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 186300 + ... + 186576.

It is an arithmetic number, because the mean of its divisors is an integer number (1941552).

Almost surely, 2^51643326 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51643326, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (62129664).

51643326 is an abundant number, since it is smaller than the sum of its proper divisors (72616002).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51643326 is a wasteful number, since it uses less digits than its factorization.

51643326 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 505.

The product of its digits is 12960, while the sum is 30.

The square root of 51643326 is about 7186.3291046264. The cubic root of 51643326 is about 372.3957662204.

The spelling of 51643326 in words is "fifty-one million, six hundred forty-three thousand, three hundred twenty-six".