521132230265440 has 24 divisors (see below), whose sum is σ = 1231174894002480. Its totient is φ = 208452892106112.

The previous prime is 521132230265371. The next prime is 521132230265441. The reversal of 521132230265440 is 44562032231125.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 521132230265393 and 521132230265402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (521132230265441) 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, 1628538219420 + ... + 1628538219739.

It is an arithmetic number, because the mean of its divisors is an integer number (51298953916770).

Almost surely, 2^{521132230265440} is an apocalyptic number.

It is an amenable number.

521132230265440 is an abundant number, since it is smaller than the sum of its proper divisors (710042663737040).

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

521132230265440 is a wasteful number, since it uses less digits than its factorization.

521132230265440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3257076439174 (or 3257076439166 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 40.

Adding to 521132230265440 its reverse (44562032231125), we get a palindrome (565694262496565).

The spelling of 521132230265440 in words is "five hundred twenty-one trillion, one hundred thirty-two billion, two hundred thirty million, two hundred sixty-five thousand, four hundred forty".