51333131 has 2 divisors, whose sum is σ = 51333132. Its totient is φ = 51333130.

The previous prime is 51333119. The next prime is 51333133. The reversal of 51333131 is 13133315.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51333131 - 2⁶ = 51333067 is a prime.

It is a super-2 number, since 2×51333131² = 5270180676526322, which contains 22 as substring.

Together with 51333133, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (51333133) by changing a digit.

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 as a sum of consecutive naturals, namely, 25666565 + 25666566.

It is an arithmetic number, because the mean of its divisors is an integer number (25666566).

Almost surely, 2^51333131 is an apocalyptic number.

51333131 is a deficient number, since it is larger than the sum of its proper divisors (1).

51333131 is an equidigital number, since it uses as much as digits as its factorization.

51333131 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 405, while the sum is 20.

The square root of 51333131 is about 7164.7142999564. The cubic root of 51333131 is about 371.6486715555.

Adding to 51333131 its reverse (13133315), we get a palindrome (64466446).

It can be divided in two parts, 513331 and 31, that multiplied together give a triangular number (15913261 = T₅₆₄₁).

The spelling of 51333131 in words is "fifty-one million, three hundred thirty-three thousand, one hundred thirty-one".