51291792 has 100 divisors (see below), whose sum is σ = 156341680. Its totient is φ = 16189632.

The previous prime is 51291791. The next prime is 51291797. The reversal of 51291792 is 29719215.

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

It is not an unprimeable number, because it can be changed into a prime (51291791) 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 19 ways as a sum of consecutive naturals, for example, 23583 + ... + 25665.

Almost surely, 2^51291792 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 51291792, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78170840).

51291792 is an abundant number, since it is smaller than the sum of its proper divisors (105049888).

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

51291792 is a wasteful number, since it uses less digits than its factorization.

51291792 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2122 (or 2107 counting only the distinct ones).

The product of its digits is 11340, while the sum is 36.

The square root of 51291792 is about 7161.8288167199. The cubic root of 51291792 is about 371.5488808348.

The spelling of 51291792 in words is "fifty-one million, two hundred ninety-one thousand, seven hundred ninety-two".