5123233351521 has 24 divisors (see below), whose sum is σ = 7426008326880. Its totient is φ = 3403604546496.

The previous prime is 5123233351513. The next prime is 5123233351637. The reversal of 5123233351521 is 1251533323215.

5123233351521 is a `hidden beast` number, since 5 + 1 + 23 + 233 + 351 + 52 + 1 = 666.

It is not a de Polignac number, because 5123233351521 - 2³ = 5123233351513 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (5123233301521) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3416181 + ... + 4681533.

It is an arithmetic number, because the mean of its divisors is an integer number (309417013620).

Almost surely, 2^{5123233351521} is an apocalyptic number.

It is an amenable number.

5123233351521 is a deficient number, since it is larger than the sum of its proper divisors (2302774975359).

5123233351521 is a wasteful number, since it uses less digits than its factorization.

5123233351521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1266925 (or 1266922 counting only the distinct ones).

The product of its digits is 81000, while the sum is 36.

Adding to 5123233351521 its reverse (1251533323215), we get a palindrome (6374766674736).

The spelling of 5123233351521 in words is "five trillion, one hundred twenty-three billion, two hundred thirty-three million, three hundred fifty-one thousand, five hundred twenty-one".