51223727 has 4 divisors (see below), whose sum is σ = 51238320. Its totient is φ = 51209136.

The previous prime is 51223723. The next prime is 51223729. The reversal of 51223727 is 72732215.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 51223727 - 2² = 51223723 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51223727.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51223723) 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, 1523 + ... + 10235.

It is an arithmetic number, because the mean of its divisors is an integer number (12809580).

Almost surely, 2^51223727 is an apocalyptic number.

51223727 is a deficient number, since it is larger than the sum of its proper divisors (14593).

51223727 is an equidigital number, since it uses as much as digits as its factorization.

51223727 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14592.

The product of its digits is 5880, while the sum is 29.

The square root of 51223727 is about 7157.0753104882. The cubic root of 51223727 is about 371.3844577153.

The spelling of 51223727 in words is "fifty-one million, two hundred twenty-three thousand, seven hundred twenty-seven".