523155235021 has 16 divisors (see below), whose sum is σ = 539026992000. Its totient is φ = 507435667200.

The previous prime is 523155234983. The next prime is 523155235061. The reversal of 523155235021 is 120532551325.

It is a cyclic number.

It is not a de Polignac number, because 523155235021 - 2¹⁵ = 523155202253 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (523155235061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10753770 + ... + 10802308.

It is an arithmetic number, because the mean of its divisors is an integer number (33689187000).

Almost surely, 2^523155235021 is an apocalyptic number.

It is an amenable number.

523155235021 is a deficient number, since it is larger than the sum of its proper divisors (15871756979).

523155235021 is a wasteful number, since it uses less digits than its factorization.

523155235021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50100.

The product of its (nonzero) digits is 45000, while the sum is 34.

Adding to 523155235021 its reverse (120532551325), we get a palindrome (643687786346).

The spelling of 523155235021 in words is "five hundred twenty-three billion, one hundred fifty-five million, two hundred thirty-five thousand, twenty-one".