51223424 has 48 divisors (see below), whose sum is σ = 118721880. Its totient is φ = 21950208.

The previous prime is 51223423. The next prime is 51223427. The reversal of 51223424 is 42432215.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 51223424.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51223423) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 2189 + ... + 10355.

Almost surely, 2^51223424 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51223424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (59360940).

51223424 is an abundant number, since it is smaller than the sum of its proper divisors (67498456).

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

51223424 is an equidigital number, since it uses as much as digits as its factorization.

51223424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8195 (or 8176 counting only the distinct ones).

The product of its digits is 1920, while the sum is 23.

The square root of 51223424 is about 7157.0541425925. The cubic root of 51223424 is about 371.3837254393.

Adding to 51223424 its reverse (42432215), we get a palindrome (93655639).

The spelling of 51223424 in words is "fifty-one million, two hundred twenty-three thousand, four hundred twenty-four".