523175909481 has 27 divisors (see below), whose sum is σ = 758792191287. Its totient is φ = 347361914160.

The previous prime is 523175909447. The next prime is 523175909489. The reversal of 523175909481 is 184909571325.

It is a happy number.

The square root of 523175909481 is 723309.

It is a perfect power (a square), and thus also a powerful number.

523175909481 is a `hidden beast` number, since 5 + 2 + 3 + 1 + 7 + 590 + 9 + 48 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 167697621081 + 355478288400 = 409509^2 + 596220^2 .

It is not a de Polignac number, because 523175909481 - 2¹⁷ = 523175778409 is a prime.

It is a super-2 number, since 2×523175909481² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (523175909489) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 1000336086 + ... + 1000336608.

Almost surely, 2^523175909481 is an apocalyptic number.

523175909481 is the 723309-th square number.

523175909481 is the 361655-th centered octagonal number.

It is an amenable number.

523175909481 is a deficient number, since it is larger than the sum of its proper divisors (235616281806).

523175909481 is an frugal number, since it uses more digits than its factorization.

523175909481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1974 (or 987 counting only the distinct ones).

The product of its (nonzero) digits is 2721600, while the sum is 54.

The spelling of 523175909481 in words is "five hundred twenty-three billion, one hundred seventy-five million, nine hundred nine thousand, four hundred eighty-one".