51161832 has 96 divisors (see below), whose sum is σ = 147420000. Its totient is φ = 15984000.

The previous prime is 51161807. The next prime is 51161837. The reversal of 51161832 is 23816115.

51161832 is a `hidden beast` number, since 5 + 11 + 618 + 32 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 51161796 and 51161805.

It is not an unprimeable number, because it can be changed into a prime (51161837) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 203707 + ... + 203957.

It is an arithmetic number, because the mean of its divisors is an integer number (1535625).

Almost surely, 2^51161832 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 51161832, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73710000).

51161832 is an abundant number, since it is smaller than the sum of its proper divisors (96258168).

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

51161832 is a wasteful number, since it uses less digits than its factorization.

51161832 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 431 (or 424 counting only the distinct ones).

The product of its digits is 1440, while the sum is 27.

The square root of 51161832 is about 7152.7499606795. The cubic root of 51161832 is about 371.2348128331.

Adding to 51161832 its reverse (23816115), we get a palindrome (74977947).

The spelling of 51161832 in words is "fifty-one million, one hundred sixty-one thousand, eight hundred thirty-two".