521045024253540 has 48 divisors (see below), whose sum is σ = 1489967048086272. Its totient is φ = 135989055974656.

The previous prime is 521045024253511. The next prime is 521045024253541. The reversal of 521045024253540 is 45352420540125.

It is a junction number, because it is equal to n+sod(n) for n = 521045024253492 and 521045024253501.

It is not an unprimeable number, because it can be changed into a prime (521045024253541) 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, 92383866729 + ... + 92383872368.

It is an arithmetic number, because the mean of its divisors is an integer number (31040980168464).

Almost surely, 2^{521045024253540} is an apocalyptic number.

It is an amenable number.

521045024253540 is an abundant number, since it is smaller than the sum of its proper divisors (968922023832732).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

521045024253540 is a wasteful number, since it uses less digits than its factorization.

521045024253540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184767739156 (or 184767739154 counting only the distinct ones).

The product of its (nonzero) digits is 960000, while the sum is 42.

Adding to 521045024253540 its reverse (45352420540125), we get a palindrome (566397444793665).

The spelling of 521045024253540 in words is "five hundred twenty-one trillion, forty-five billion, twenty-four million, two hundred fifty-three thousand, five hundred forty".