51231263 has 8 divisors (see below), whose sum is σ = 53148480. Its totient is φ = 49345920.

The previous prime is 51231259. The next prime is 51231283. The reversal of 51231263 is 36213215.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 51231263 - 2² = 51231259 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51231203) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4670 + ... + 11147.

It is an arithmetic number, because the mean of its divisors is an integer number (6643560).

Almost surely, 2^51231263 is an apocalyptic number.

51231263 is a deficient number, since it is larger than the sum of its proper divisors (1917217).

51231263 is a wasteful number, since it uses less digits than its factorization.

51231263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15937.

The product of its digits is 1080, while the sum is 23.

The square root of 51231263 is about 7157.6017631606. The cubic root of 51231263 is about 371.4026694321.

Adding to 51231263 its reverse (36213215), we get a palindrome (87444478).

The spelling of 51231263 in words is "fifty-one million, two hundred thirty-one thousand, two hundred sixty-three".