51381792 has 216 divisors, whose sum is σ = 185985072. Its totient is φ = 13305600.

The previous prime is 51381749. The next prime is 51381797. The reversal of 51381792 is 29718315.

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 (51381797) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 155067 + ... + 155397.

It is an arithmetic number, because the mean of its divisors is an integer number (861042).

Almost surely, 2^51381792 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 51381792, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (92992536).

51381792 is an abundant number, since it is smaller than the sum of its proper divisors (134603280).

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

51381792 is a wasteful number, since it uses less digits than its factorization.

51381792 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 372 (or 354 counting only the distinct ones).

The product of its digits is 15120, while the sum is 36.

The square root of 51381792 is about 7168.1093741655. The cubic root of 51381792 is about 371.7660686712.

The spelling of 51381792 in words is "fifty-one million, three hundred eighty-one thousand, seven hundred ninety-two".