51233223136511 has 8 divisors (see below), whose sum is σ = 55175135876784. Its totient is φ = 47291438335680.

The previous prime is 51233223136481. The next prime is 51233223136549. The reversal of 51233223136511 is 11563132233215.

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-51233223136511 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 (51233223136411) 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, 31152350 + ... + 32755691.

It is an arithmetic number, because the mean of its divisors is an integer number (6896891984598).

Almost surely, 2^{51233223136511} is an apocalyptic number.

51233223136511 is a deficient number, since it is larger than the sum of its proper divisors (3941912740273).

51233223136511 is a wasteful number, since it uses less digits than its factorization.

51233223136511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63969721.

The product of its digits is 97200, while the sum is 38.

Adding to 51233223136511 its reverse (11563132233215), we get a palindrome (62796355369726).

The spelling of 51233223136511 in words is "fifty-one trillion, two hundred thirty-three billion, two hundred twenty-three million, one hundred thirty-six thousand, five hundred eleven".