51867144 has 48 divisors (see below), whose sum is σ = 160542720. Its totient is φ = 14819040.

The previous prime is 51867143. The next prime is 51867149. The reversal of 51867144 is 44176815.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 51867099 and 51867108.

It is not an unprimeable number, because it can be changed into a prime (51867143) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 50952 + ... + 51959.

It is an arithmetic number, because the mean of its divisors is an integer number (3344640).

Almost surely, 2^51867144 is an apocalyptic number.

It is an amenable number.

51867144 is an abundant number, since it is smaller than the sum of its proper divisors (108675576).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51867144 is a wasteful number, since it uses less digits than its factorization.

51867144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102930 (or 102923 counting only the distinct ones).

The product of its digits is 26880, while the sum is 36.

The square root of 51867144 is about 7201.8847533128. The cubic root of 51867144 is about 372.9329686176.

The spelling of 51867144 in words is "fifty-one million, eight hundred sixty-seven thousand, one hundred forty-four".