51869827 has 4 divisors (see below), whose sum is σ = 51985800. Its totient is φ = 51753856.

The previous prime is 51869821. The next prime is 51869833. The reversal of 51869827 is 72896815.

51869827 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 an emirpimes, since its reverse is a distinct semiprime: 72896815 = 5 ⋅14579363.

It is an interprime number because it is at equal distance from previous prime (51869821) and next prime (51869833).

It is a cyclic number.

It is not a de Polignac number, because 51869827 - 2²³ = 43481219 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51869821) 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, 57313 + ... + 58210.

It is an arithmetic number, because the mean of its divisors is an integer number (12996450).

Almost surely, 2^51869827 is an apocalyptic number.

51869827 is a deficient number, since it is larger than the sum of its proper divisors (115973).

51869827 is a wasteful number, since it uses less digits than its factorization.

51869827 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115972.

The product of its digits is 241920, while the sum is 46.

The square root of 51869827 is about 7202.0710215882. The cubic root of 51869827 is about 372.9393989049.

The spelling of 51869827 in words is "fifty-one million, eight hundred sixty-nine thousand, eight hundred twenty-seven".