51224072 has 16 divisors (see below), whose sum is σ = 96584400. Its totient is φ = 25468240.

The previous prime is 51224029. The next prime is 51224081. The reversal of 51224072 is 27042215.

It is a happy number.

It is a super-2 number, since 2×51224072² = 5247811104522368, which contains 22 as substring.

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 3 ways as a sum of consecutive naturals, for example, 16454 + ... + 19317.

It is an arithmetic number, because the mean of its divisors is an integer number (6036525).

Almost surely, 2^51224072 is an apocalyptic number.

It is an amenable number.

51224072 is a deficient number, since it is larger than the sum of its proper divisors (45360328).

51224072 is a wasteful number, since it uses less digits than its factorization.

51224072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35956 (or 35952 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 23.

The square root of 51224072 is about 7157.0994124715. The cubic root of 51224072 is about 371.3852914913.

Adding to 51224072 its reverse (27042215), we get a palindrome (78266287).

The spelling of 51224072 in words is "fifty-one million, two hundred twenty-four thousand, seventy-two".