51389223 has 16 divisors (see below), whose sum is σ = 69711840. Its totient is φ = 33668096.

The previous prime is 51389213. The next prime is 51389231. The reversal of 51389223 is 32298315.

It is a cyclic number.

It is not a de Polignac number, because 51389223 - 2⁴ = 51389207 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51389213) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52111 + ... + 53087.

It is an arithmetic number, because the mean of its divisors is an integer number (4356990).

Almost surely, 2^51389223 is an apocalyptic number.

51389223 is a deficient number, since it is larger than the sum of its proper divisors (18322617).

51389223 is a wasteful number, since it uses less digits than its factorization.

51389223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1266.

The product of its digits is 12960, while the sum is 33.

The square root of 51389223 is about 7168.6276929410. The cubic root of 51389223 is about 371.7839898087.

The spelling of 51389223 in words is "fifty-one million, three hundred eighty-nine thousand, two hundred twenty-three".