51477891 has 8 divisors (see below), whose sum is σ = 69161664. Its totient is φ = 34056360.

The previous prime is 51477847. The next prime is 51477931. The reversal of 51477891 is 19877415.

51477891 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 51477891 - 2²⁵ = 17923459 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51477691) 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 7 ways as a sum of consecutive naturals, for example, 65101 + ... + 65886.

It is an arithmetic number, because the mean of its divisors is an integer number (8645208).

Almost surely, 2^51477891 is an apocalyptic number.

51477891 is a deficient number, since it is larger than the sum of its proper divisors (17683773).

51477891 is a wasteful number, since it uses less digits than its factorization.

51477891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131121.

The product of its digits is 70560, while the sum is 42.

The square root of 51477891 is about 7174.8094748223. The cubic root of 51477891 is about 371.9976948059.

The spelling of 51477891 in words is "fifty-one million, four hundred seventy-seven thousand, eight hundred ninety-one".