51145330223 has 8 divisors (see below), whose sum is σ = 55364975568. Its totient is φ = 46966454784.

The previous prime is 51145330193. The next prime is 51145330241. The reversal of 51145330223 is 32203354115.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51145330223 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 (51145330283) 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, 10189865 + ... + 10194882.

It is an arithmetic number, because the mean of its divisors is an integer number (6920621946).

Almost surely, 2^51145330223 is an apocalyptic number.

51145330223 is a deficient number, since it is larger than the sum of its proper divisors (4219645345).

51145330223 is a wasteful number, since it uses less digits than its factorization.

51145330223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20384953.

The product of its (nonzero) digits is 10800, while the sum is 29.

Adding to 51145330223 its reverse (32203354115), we get a palindrome (83348684338).

The spelling of 51145330223 in words is "fifty-one billion, one hundred forty-five million, three hundred thirty thousand, two hundred twenty-three".