523553414621 has 4 divisors (see below), whose sum is σ = 523558014012. Its totient is φ = 523548815232.

The previous prime is 523553414617. The next prime is 523553414641. The reversal of 523553414621 is 126414355325.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 204791546521 + 318761868100 = 452539^2 + 564590^2 .

It is a cyclic number.

It is not a de Polignac number, because 523553414621 - 2² = 523553414617 is a prime.

It is a super-2 number, since 2×523553414621² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (523553414641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2124500 + ... + 2358093.

It is an arithmetic number, because the mean of its divisors is an integer number (130889503503).

Almost surely, 2^523553414621 is an apocalyptic number.

It is an amenable number.

523553414621 is a deficient number, since it is larger than the sum of its proper divisors (4599391).

523553414621 is a wasteful number, since it uses less digits than its factorization.

523553414621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4599390.

The product of its digits is 432000, while the sum is 41.

Adding to 523553414621 its reverse (126414355325), we get a palindrome (649967769946).

The spelling of 523553414621 in words is "five hundred twenty-three billion, five hundred fifty-three million, four hundred fourteen thousand, six hundred twenty-one".