523020171322781 has 16 divisors (see below), whose sum is σ = 572093607099840. Its totient is φ = 474201184222080.

The previous prime is 523020171322771. The next prime is 523020171322843. The reversal of 523020171322781 is 187223171020325.

It is a cyclic number.

It is not a de Polignac number, because 523020171322781 - 2¹⁴ = 523020171306397 is a prime.

It is a super-4 number, since 4×523020171322781⁴ (a number of 60 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (523020171322771) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 113714075 + ... + 118224071.

It is an arithmetic number, because the mean of its divisors is an integer number (35755850443740).

Almost surely, 2^{523020171322781} is an apocalyptic number.

It is an amenable number.

523020171322781 is a deficient number, since it is larger than the sum of its proper divisors (49073435777059).

523020171322781 is a wasteful number, since it uses less digits than its factorization.

523020171322781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4538204.

The product of its (nonzero) digits is 282240, while the sum is 44.

The spelling of 523020171322781 in words is "five hundred twenty-three trillion, twenty billion, one hundred seventy-one million, three hundred twenty-two thousand, seven hundred eighty-one".