51072331 has 2 divisors, whose sum is σ = 51072332. Its totient is φ = 51072330.

The previous prime is 51072319. The next prime is 51072341. The reversal of 51072331 is 13327015.

51072331 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51072331 - 2⁵ = 51072299 is a prime.

It is a super-2 number, since 2×51072331² = 5216765987547122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (51072341) 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 as a sum of consecutive naturals, namely, 25536165 + 25536166.

It is an arithmetic number, because the mean of its divisors is an integer number (25536166).

Almost surely, 2^51072331 is an apocalyptic number.

51072331 is a deficient number, since it is larger than the sum of its proper divisors (1).

51072331 is an equidigital number, since it uses as much as digits as its factorization.

51072331 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 630, while the sum is 22.

The square root of 51072331 is about 7146.4908171773. The cubic root of 51072331 is about 371.0182107339.

Adding to 51072331 its reverse (13327015), we get a palindrome (64399346).

The spelling of 51072331 in words is "fifty-one million, seventy-two thousand, three hundred thirty-one".