51017796 has 48 divisors (see below), whose sum is σ = 132914880. Its totient is φ = 16922880.

The previous prime is 51017779. The next prime is 51017801. The reversal of 51017796 is 69771015.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 51017796.

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, 23476 + ... + 25556.

It is an arithmetic number, because the mean of its divisors is an integer number (2769060).

Almost surely, 2^51017796 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 51017796, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (66457440).

51017796 is an abundant number, since it is smaller than the sum of its proper divisors (81897084).

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

51017796 is a wasteful number, since it uses less digits than its factorization.

51017796 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2321 (or 2313 counting only the distinct ones).

The product of its (nonzero) digits is 13230, while the sum is 36.

The square root of 51017796 is about 7142.6742890881. The cubic root of 51017796 is about 370.8861060387.

The spelling of 51017796 in words is "fifty-one million, seventeen thousand, seven hundred ninety-six".