51423144 has 32 divisors (see below), whose sum is σ = 130986720. Its totient is φ = 16817216.

The previous prime is 51423109. The next prime is 51423157. The reversal of 51423144 is 44132415.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 18942 + ... + 21485.

It is an arithmetic number, because the mean of its divisors is an integer number (4093335).

Almost surely, 2^51423144 is an apocalyptic number.

It is an amenable number.

51423144 is an abundant number, since it is smaller than the sum of its proper divisors (79563576).

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

51423144 is a wasteful number, since it uses less digits than its factorization.

51423144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40489 (or 40485 counting only the distinct ones).

The product of its digits is 1920, while the sum is 24.

The square root of 51423144 is about 7170.9932366444. The cubic root of 51423144 is about 371.8657742127.

Adding to 51423144 its reverse (44132415), we get a palindrome (95555559).

The spelling of 51423144 in words is "fifty-one million, four hundred twenty-three thousand, one hundred forty-four".