51315224 has 8 divisors (see below), whose sum is σ = 96216060. Its totient is φ = 25657608.

The previous prime is 51315217. The next prime is 51315227. The reversal of 51315224 is 42251315.

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 51315224.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51315227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3207194 + ... + 3207209.

Almost surely, 2^51315224 is an apocalyptic number.

It is an amenable number.

51315224 is a deficient number, since it is larger than the sum of its proper divisors (44900836).

51315224 is a wasteful number, since it uses less digits than its factorization.

51315224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6414409 (or 6414405 counting only the distinct ones).

The product of its digits is 1200, while the sum is 23.

The square root of 51315224 is about 7163.4645249348. The cubic root of 51315224 is about 371.6054513412.

Adding to 51315224 its reverse (42251315), we get a palindrome (93566539).

The spelling of 51315224 in words is "fifty-one million, three hundred fifteen thousand, two hundred twenty-four".