51232231 has 4 divisors (see below), whose sum is σ = 51515464. Its totient is φ = 50949000.

The previous prime is 51232219. The next prime is 51232261. The reversal of 51232231 is 13223215.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 51232231 - 2¹¹ = 51230183 is a prime.

It is a super-2 number, since 2×51232231² = 5249482986474722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51232199 and 51232208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51232261) 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 3 ways as a sum of consecutive naturals, for example, 141345 + ... + 141706.

It is an arithmetic number, because the mean of its divisors is an integer number (12878866).

Almost surely, 2^51232231 is an apocalyptic number.

51232231 is a deficient number, since it is larger than the sum of its proper divisors (283233).

51232231 is a wasteful number, since it uses less digits than its factorization.

51232231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 283232.

The product of its digits is 360, while the sum is 19.

The square root of 51232231 is about 7157.6693832560. The cubic root of 51232231 is about 371.4050085996.

Adding to 51232231 its reverse (13223215), we get a palindrome (64455446).

The spelling of 51232231 in words is "fifty-one million, two hundred thirty-two thousand, two hundred thirty-one".