523142405521 has 8 divisors (see below), whose sum is σ = 538166554880. Its totient is φ = 508164843888.

The previous prime is 523142405519. The next prime is 523142405557. The reversal of 523142405521 is 125504241325.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 523142405521 - 2¹ = 523142405519 is a prime.

It is a super-2 number, since 2×523142405521² (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 (523142405501) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11624151 + ... + 11669068.

It is an arithmetic number, because the mean of its divisors is an integer number (67270819360).

Almost surely, 2^523142405521 is an apocalyptic number.

It is an amenable number.

523142405521 is a deficient number, since it is larger than the sum of its proper divisors (15024149359).

523142405521 is a wasteful number, since it uses less digits than its factorization.

523142405521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23293863.

The product of its (nonzero) digits is 48000, while the sum is 34.

Adding to 523142405521 its reverse (125504241325), we get a palindrome (648646646846).

The spelling of 523142405521 in words is "five hundred twenty-three billion, one hundred forty-two million, four hundred five thousand, five hundred twenty-one".