51224031 has 24 divisors (see below), whose sum is σ = 76527360. Its totient is φ = 32997456.

The previous prime is 51224029. The next prime is 51224081. The reversal of 51224031 is 13042215.

It is not a de Polignac number, because 51224031 - 2¹ = 51224029 is a prime.

It is a super-2 number, since 2×51224031² = 5247802703777922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 51223995 and 51224013.

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 (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 34380 + ... + 35838.

It is an arithmetic number, because the mean of its divisors is an integer number (3188640).

Almost surely, 2^51224031 is an apocalyptic number.

51224031 is a deficient number, since it is larger than the sum of its proper divisors (25303329).

51224031 is a wasteful number, since it uses less digits than its factorization.

51224031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1595 (or 1592 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 51224031 is about 7157.0965481821. The cubic root of 51224031 is about 371.3851924051.

Adding to 51224031 its reverse (13042215), we get a palindrome (64266246).

The spelling of 51224031 in words is "fifty-one million, two hundred twenty-four thousand, thirty-one".