51247223 has 8 divisors (see below), whose sum is σ = 52357200. Its totient is φ = 50145408.

The previous prime is 51247219. The next prime is 51247267. The reversal of 51247223 is 32274215.

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 51247223 - 2² = 51247219 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51247192 and 51247201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51247213) 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, 11615 + ... + 15407.

It is an arithmetic number, because the mean of its divisors is an integer number (6544650).

Almost surely, 2^51247223 is an apocalyptic number.

51247223 is a deficient number, since it is larger than the sum of its proper divisors (1109977).

51247223 is a wasteful number, since it uses less digits than its factorization.

51247223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4081.

The product of its digits is 3360, while the sum is 26.

The square root of 51247223 is about 7158.7165749176. The cubic root of 51247223 is about 371.4412329369.

The spelling of 51247223 in words is "fifty-one million, two hundred forty-seven thousand, two hundred twenty-three".