51224071 has 4 divisors (see below), whose sum is σ = 51238432. Its totient is φ = 51209712.

The previous prime is 51224029. The next prime is 51224081. The reversal of 51224071 is 17042215.

It is a happy number.

51224071 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 51224071 - 2⁹ = 51223559 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51224081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2731 + ... + 10483.

It is an arithmetic number, because the mean of its divisors is an integer number (12809608).

Almost surely, 2^51224071 is an apocalyptic number.

51224071 is a deficient number, since it is larger than the sum of its proper divisors (14361).

51224071 is an equidigital number, since it uses as much as digits as its factorization.

51224071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14360.

The product of its (nonzero) digits is 560, while the sum is 22.

The square root of 51224071 is about 7157.0993426108. The cubic root of 51224071 is about 371.3852890746.

Adding to 51224071 its reverse (17042215), we get a palindrome (68266286).

The spelling of 51224071 in words is "fifty-one million, two hundred twenty-four thousand, seventy-one".