51241231 has 4 divisors (see below), whose sum is σ = 53008200. Its totient is φ = 49474264.

The previous prime is 51241219. The next prime is 51241237. The reversal of 51241231 is 13214215.

51241231 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 51241231 - 2⁵ = 51241199 is a prime.

It is a super-2 number, since 2×51241231² = 5251327508790722, 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 = 51241199 and 51241208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51241237) 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 in 3 ways as a sum of consecutive naturals, for example, 883441 + ... + 883498.

It is an arithmetic number, because the mean of its divisors is an integer number (13252050).

Almost surely, 2^51241231 is an apocalyptic number.

51241231 is a deficient number, since it is larger than the sum of its proper divisors (1766969).

51241231 is a wasteful number, since it uses less digits than its factorization.

51241231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1766968.

The product of its digits is 240, while the sum is 19.

The square root of 51241231 is about 7158.2980519115. The cubic root of 51241231 is about 371.4267556476.

Adding to 51241231 its reverse (13214215), we get a palindrome (64455446).

The spelling of 51241231 in words is "fifty-one million, two hundred forty-one thousand, two hundred thirty-one".