51053881 has 4 divisors (see below), whose sum is σ = 51669072. Its totient is φ = 50438692.

The previous prime is 51053879. The next prime is 51053903. The reversal of 51053881 is 18835015.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 51053881 - 2¹ = 51053879 is a prime.

It is a super-3 number, since 3×51053881³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51053851) 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 3 ways as a sum of consecutive naturals, for example, 307471 + ... + 307636.

It is an arithmetic number, because the mean of its divisors is an integer number (12917268).

Almost surely, 2^51053881 is an apocalyptic number.

It is an amenable number.

51053881 is a deficient number, since it is larger than the sum of its proper divisors (615191).

51053881 is an equidigital number, since it uses as much as digits as its factorization.

51053881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 615190.

The product of its (nonzero) digits is 4800, while the sum is 31.

The square root of 51053881 is about 7145.1998572468. The cubic root of 51053881 is about 370.9735282851.

Adding to 51053881 its reverse (18835015), we get a palindrome (69888896).

The spelling of 51053881 in words is "fifty-one million, fifty-three thousand, eight hundred eighty-one".