512454123523 has 4 divisors (see below), whose sum is σ = 513147566920. Its totient is φ = 511760680128.

The previous prime is 512454123491. The next prime is 512454123527. The reversal of 512454123523 is 325321454215.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 512454123523 - 2⁵ = 512454123491 is a prime.

It is a super-2 number, since 2×512454123523² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (512454123527) 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, 346720590 + ... + 346722067.

It is an arithmetic number, because the mean of its divisors is an integer number (128286891730).

Almost surely, 2^512454123523 is an apocalyptic number.

512454123523 is a deficient number, since it is larger than the sum of its proper divisors (693443397).

512454123523 is an equidigital number, since it uses as much as digits as its factorization.

512454123523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 693443396.

The product of its digits is 144000, while the sum is 37.

Adding to 512454123523 its reverse (325321454215), we get a palindrome (837775577738).

The spelling of 512454123523 in words is "five hundred twelve billion, four hundred fifty-four million, one hundred twenty-three thousand, five hundred twenty-three".