51012263 has 4 divisors (see below), whose sum is σ = 51147240. Its totient is φ = 50877288.

The previous prime is 51012253. The next prime is 51012277. The reversal of 51012263 is 36221015.

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 51012263 - 2⁸ = 51012007 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 (51012253) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66920 + ... + 67677.

It is an arithmetic number, because the mean of its divisors is an integer number (12786810).

Almost surely, 2^51012263 is an apocalyptic number.

51012263 is a deficient number, since it is larger than the sum of its proper divisors (134977).

51012263 is a wasteful number, since it uses less digits than its factorization.

51012263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134976.

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 51012263 is about 7142.2869586709. The cubic root of 51012263 is about 370.8726977304.

Adding to 51012263 its reverse (36221015), we get a palindrome (87233278).

The spelling of 51012263 in words is "fifty-one million, twelve thousand, two hundred sixty-three".