51316224 has 40 divisors (see below), whose sum is σ = 136713720. Its totient is φ = 17104896.

The previous prime is 51316211. The next prime is 51316229. The reversal of 51316224 is 42261315.

It is a hoax number, since the sum of its digits (24) coincides with the sum of the digits of its distinct prime factors.

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

It is a zygodrome in base 2.

It is a junction number, because it is equal to n+sod(n) for n = 51316194 and 51316203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51316229) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15169 + ... + 18240.

It is an arithmetic number, because the mean of its divisors is an integer number (3417843).

Almost surely, 2^51316224 is an apocalyptic number.

It is an amenable number.

51316224 is an abundant number, since it is smaller than the sum of its proper divisors (85397496).

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

51316224 is an equidigital number, since it uses as much as digits as its factorization.

51316224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33430 (or 33414 counting only the distinct ones).

The product of its digits is 1440, while the sum is 24.

The square root of 51316224 is about 7163.5343232234. The cubic root of 51316224 is about 371.6078651995.

Adding to 51316224 its reverse (42261315), we get a palindrome (93577539).

The spelling of 51316224 in words is "fifty-one million, three hundred sixteen thousand, two hundred twenty-four".