51452231 has 2 divisors, whose sum is σ = 51452232. Its totient is φ = 51452230.

The previous prime is 51452227. The next prime is 51452267. The reversal of 51452231 is 13225415.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51452231 - 2² = 51452227 is a prime.

It is a super-2 number, since 2×51452231² = 5294664149754722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 51452197 and 51452206.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51452201) 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, 25726115 + 25726116.

It is an arithmetic number, because the mean of its divisors is an integer number (25726116).

Almost surely, 2^51452231 is an apocalyptic number.

51452231 is a deficient number, since it is larger than the sum of its proper divisors (1).

51452231 is an equidigital number, since it uses as much as digits as its factorization.

51452231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1200, while the sum is 23.

The square root of 51452231 is about 7173.0210511332. The cubic root of 51452231 is about 371.9358750801.

Adding to 51452231 its reverse (13225415), we get a palindrome (64677646).

The spelling of 51452231 in words is "fifty-one million, four hundred fifty-two thousand, two hundred thirty-one".