51885317 has 4 divisors (see below), whose sum is σ = 56602176. Its totient is φ = 47168460.

The previous prime is 51885313. The next prime is 51885373. The reversal of 51885317 is 71358815.

51885317 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 51885317 - 2² = 51885313 is a prime.

It is a super-2 number, since 2×51885317² = 5384172240380978, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51885311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2358413 + ... + 2358434.

It is an arithmetic number, because the mean of its divisors is an integer number (14150544).

Almost surely, 2^51885317 is an apocalyptic number.

It is an amenable number.

51885317 is a deficient number, since it is larger than the sum of its proper divisors (4716859).

51885317 is a wasteful number, since it uses less digits than its factorization.

51885317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4716858.

The product of its digits is 33600, while the sum is 38.

The square root of 51885317 is about 7203.1463264326. The cubic root of 51885317 is about 372.9765191131.

The spelling of 51885317 in words is "fifty-one million, eight hundred eighty-five thousand, three hundred seventeen".