51055881 has 8 divisors (see below), whose sum is σ = 68397984. Its totient is φ = 33875520.

The previous prime is 51055871. The next prime is 51055889. The reversal of 51055881 is 18855015.

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

It is not a de Polignac number, because 51055881 - 2²¹ = 48958729 is a prime.

It is a super-2 number, since 2×51055881² = 5213405969372322, which contains 22 as substring.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (51055889) 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, 39696 + ... + 40961.

It is an arithmetic number, because the mean of its divisors is an integer number (8549748).

Almost surely, 2^51055881 is an apocalyptic number.

It is an amenable number.

51055881 is a deficient number, since it is larger than the sum of its proper divisors (17342103).

51055881 is a wasteful number, since it uses less digits than its factorization.

51055881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80871.

The product of its (nonzero) digits is 8000, while the sum is 33.

The square root of 51055881 is about 7145.3398099741. The cubic root of 51055881 is about 370.9783724312.

The spelling of 51055881 in words is "fifty-one million, fifty-five thousand, eight hundred eighty-one".