523145041241621 has 16 divisors (see below), whose sum is σ = 528656010040704. Its totient is φ = 517642526928384.

The previous prime is 523145041241611. The next prime is 523145041241623. The reversal of 523145041241621 is 126142140541325.

It is a cyclic number.

It is not a de Polignac number, because 523145041241621 - 2¹⁰ = 523145041240597 is a prime.

It is a super-2 number, since 2×523145041241621² (a number of 30 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 (523145041241623) 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, 722061281 + ... + 722785433.

It is an arithmetic number, because the mean of its divisors is an integer number (33041000627544).

Almost surely, 2^{523145041241621} is an apocalyptic number.

It is an amenable number.

523145041241621 is a deficient number, since it is larger than the sum of its proper divisors (5510968799083).

523145041241621 is a wasteful number, since it uses less digits than its factorization.

523145041241621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 729980.

The product of its (nonzero) digits is 230400, while the sum is 41.

Adding to 523145041241621 its reverse (126142140541325), we get a palindrome (649287181782946).

The spelling of 523145041241621 in words is "five hundred twenty-three trillion, one hundred forty-five billion, forty-one million, two hundred forty-one thousand, six hundred twenty-one".