51224551 has 12 divisors (see below), whose sum is σ = 62725080. Its totient is φ = 41595120.

The previous prime is 51224549. The next prime is 51224597. The reversal of 51224551 is 15542215.

It is not a de Polignac number, because 51224551 - 2¹ = 51224549 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51224851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 26580 + ... + 28441.

It is an arithmetic number, because the mean of its divisors is an integer number (5227090).

Almost surely, 2^51224551 is an apocalyptic number.

51224551 is a deficient number, since it is larger than the sum of its proper divisors (11500529).

51224551 is a wasteful number, since it uses less digits than its factorization.

51224551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55054 (or 55047 counting only the distinct ones).

The product of its digits is 2000, while the sum is 25.

The square root of 51224551 is about 7157.1328756703. The cubic root of 51224551 is about 371.3864491046.

Adding to 51224551 its reverse (15542215), we get a palindrome (66766766).

The spelling of 51224551 in words is "fifty-one million, two hundred twenty-four thousand, five hundred fifty-one".