51481136 has 40 divisors (see below), whose sum is σ = 115067040. Its totient is φ = 21855744.

The previous prime is 51481093. The next prime is 51481141. The reversal of 51481136 is 63118415.

It is a junction number, because it is equal to n+sod(n) for n = 51481099 and 51481108.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10100 + ... + 14316.

It is an arithmetic number, because the mean of its divisors is an integer number (2876676).

Almost surely, 2^51481136 is an apocalyptic number.

51481136 is a gapful number since it is divisible by the number (56) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51481136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (57533520).

51481136 is an abundant number, since it is smaller than the sum of its proper divisors (63585904).

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

51481136 is a wasteful number, since it uses less digits than its factorization.

51481136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4341 (or 4335 counting only the distinct ones).

The product of its digits is 2880, while the sum is 29.

The square root of 51481136 is about 7175.0356096677. The cubic root of 51481136 is about 372.0055111528.

The spelling of 51481136 in words is "fifty-one million, four hundred eighty-one thousand, one hundred thirty-six".