51474881 has 8 divisors (see below), whose sum is σ = 53226600. Its totient is φ = 49742208.

The previous prime is 51474877. The next prime is 51474883. The reversal of 51474881 is 18847415.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 20394256 + 31080625 = 4516^2 + 5575^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 51474881 - 2² = 51474877 is a prime.

It is a super-2 number, since 2×51474881² = 5299326747928322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51474883) 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 7 ways as a sum of consecutive naturals, for example, 845 + ... + 10181.

It is an arithmetic number, because the mean of its divisors is an integer number (6653325).

Almost surely, 2^51474881 is an apocalyptic number.

It is an amenable number.

51474881 is a deficient number, since it is larger than the sum of its proper divisors (1751719).

51474881 is a wasteful number, since it uses less digits than its factorization.

51474881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9523.

The product of its digits is 35840, while the sum is 38.

The square root of 51474881 is about 7174.5997100884. The cubic root of 51474881 is about 371.9904442183.

The spelling of 51474881 in words is "fifty-one million, four hundred seventy-four thousand, eight hundred eighty-one".