51236736 has 128 divisors (see below), whose sum is σ = 145411200. Its totient is φ = 15955968.

The previous prime is 51236701. The next prime is 51236747. The reversal of 51236736 is 63763215.

It is a tau number, because it is divible by the number of its divisors (128).

It is a junction number, because it is equal to n+sod(n) for n = 51236697 and 51236706.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 478795 + ... + 478901.

It is an arithmetic number, because the mean of its divisors is an integer number (1136025).

Almost surely, 2^51236736 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51236736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72705600).

51236736 is an abundant number, since it is smaller than the sum of its proper divisors (94174464).

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

51236736 is a wasteful number, since it uses less digits than its factorization.

51236736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196 (or 184 counting only the distinct ones).

The product of its digits is 22680, while the sum is 33.

The square root of 51236736 is about 7157.9840737459. The cubic root of 51236736 is about 371.4158945237.

The spelling of 51236736 in words is "fifty-one million, two hundred thirty-six thousand, seven hundred thirty-six".