51911736 has 64 divisors (see below), whose sum is σ = 136512000. Its totient is φ = 16418688.

The previous prime is 51911719. The next prime is 51911747. The reversal of 51911736 is 63711915.

It is a happy number.

It is a zygodrome in base 2.

It is a junction number, because it is equal to n+sod(n) for n = 51911697 and 51911706.

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, 86365 + ... + 86963.

It is an arithmetic number, because the mean of its divisors is an integer number (2133000).

Almost surely, 2^51911736 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 51911736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68256000).

51911736 is an abundant number, since it is smaller than the sum of its proper divisors (84600264).

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

51911736 is a wasteful number, since it uses less digits than its factorization.

51911736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 788 (or 784 counting only the distinct ones).

The product of its digits is 5670, while the sum is 33.

The square root of 51911736 is about 7204.9799444551. The cubic root of 51911736 is about 373.0398125152.

The spelling of 51911736 in words is "fifty-one million, nine hundred eleven thousand, seven hundred thirty-six".