523221657873 has 8 divisors (see below), whose sum is σ = 697646607168. Its totient is φ = 348805573584.

The previous prime is 523221657851. The next prime is 523221657961. The reversal of 523221657873 is 378756122325.

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

It is not a de Polignac number, because 523221657873 - 2⁸ = 523221657617 is a prime.

It is not an unprimeable number, because it can be changed into a prime (523222657873) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2077290 + ... + 2315507.

It is an arithmetic number, because the mean of its divisors is an integer number (87205825896).

Almost surely, 2^523221657873 is an apocalyptic number.

It is an amenable number.

523221657873 is a deficient number, since it is larger than the sum of its proper divisors (174424949295).

523221657873 is a wasteful number, since it uses less digits than its factorization.

523221657873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4432503.

The product of its digits is 4233600, while the sum is 51.

The spelling of 523221657873 in words is "five hundred twenty-three billion, two hundred twenty-one million, six hundred fifty-seven thousand, eight hundred seventy-three".