51184881 has 24 divisors (see below), whose sum is σ = 81469440. Its totient is φ = 30708000.

The previous prime is 51184877. The next prime is 51184883. The reversal of 51184881 is 18848115.

It is a happy number.

It is not a de Polignac number, because 51184881 - 2² = 51184877 is a prime.

It is a super-2 number, since 2×51184881² = 5239784085968322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51184883) 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 23 ways as a sum of consecutive naturals, for example, 7440 + ... + 12558.

It is an arithmetic number, because the mean of its divisors is an integer number (3394560).

Almost surely, 2^51184881 is an apocalyptic number.

It is an amenable number.

51184881 is a deficient number, since it is larger than the sum of its proper divisors (30284559).

51184881 is a wasteful number, since it uses less digits than its factorization.

51184881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5237 (or 5234 counting only the distinct ones).

The product of its digits is 10240, while the sum is 36.

The square root of 51184881 is about 7154.3609777534. The cubic root of 51184881 is about 371.2905529962.

It can be divided in two parts, 5118 and 4881, that added together give a palindrome (9999).

The spelling of 51184881 in words is "fifty-one million, one hundred eighty-four thousand, eight hundred eighty-one".