51304881 has 8 divisors (see below), whose sum is σ = 71380800. Its totient is φ = 32716112.

The previous prime is 51304859. The next prime is 51304889. The reversal of 51304881 is 18840315.

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

It is a cyclic number.

It is not a de Polignac number, because 51304881 - 2⁵ = 51304849 is a prime.

It is a super-2 number, since 2×51304881² = 5264381628848322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51304889) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 371706 + ... + 371843.

It is an arithmetic number, because the mean of its divisors is an integer number (8922600).

Almost surely, 2^51304881 is an apocalyptic number.

It is an amenable number.

51304881 is a deficient number, since it is larger than the sum of its proper divisors (20075919).

51304881 is a wasteful number, since it uses less digits than its factorization.

51304881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 743575.

The product of its (nonzero) digits is 3840, while the sum is 30.

The square root of 51304881 is about 7162.7425613378. The cubic root of 51304881 is about 371.5804829651.

It can be divided in two parts, 5130 and 4881, that added together give a triangular number (10011 = T₁₄₁).

The spelling of 51304881 in words is "fifty-one million, three hundred four thousand, eight hundred eighty-one".