51532331 has 2 divisors, whose sum is σ = 51532332. Its totient is φ = 51532330.

The previous prime is 51532301. The next prime is 51532337. The reversal of 51532331 is 13323515.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51532331 is a prime.

It is a super-2 number, since 2×51532331² = 5311162276587122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 51532297 and 51532306.

It is not a weakly prime, because it can be changed into another prime (51532337) 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, 25766165 + 25766166.

It is an arithmetic number, because the mean of its divisors is an integer number (25766166).

Almost surely, 2^51532331 is an apocalyptic number.

51532331 is a deficient number, since it is larger than the sum of its proper divisors (1).

51532331 is an equidigital number, since it uses as much as digits as its factorization.

51532331 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1350, while the sum is 23.

The square root of 51532331 is about 7178.6023012840. The cubic root of 51532331 is about 372.1287829252.

Adding to 51532331 its reverse (13323515), we get a palindrome (64855846).

It can be divided in two parts, 5 and 1532331, that multiplied together give a triangular number (7661655 = T₃₉₁₄).

The spelling of 51532331 in words is "fifty-one million, five hundred thirty-two thousand, three hundred thirty-one".