520221412734 has 32 divisors (see below), whose sum is σ = 1078549520256. Its totient is φ = 167143623840.

The previous prime is 520221412663. The next prime is 520221412751. The reversal of 520221412734 is 437214122025.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 520221412695 and 520221412704.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10926432 + ... + 10973939.

It is an arithmetic number, because the mean of its divisors is an integer number (33704672508).

Almost surely, 2^520221412734 is an apocalyptic number.

520221412734 is an abundant number, since it is smaller than the sum of its proper divisors (558328107522).

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

520221412734 is a wasteful number, since it uses less digits than its factorization.

520221412734 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21900520.

The product of its (nonzero) digits is 26880, while the sum is 33.

Adding to 520221412734 its reverse (437214122025), we get a palindrome (957435534759).

The spelling of 520221412734 in words is "five hundred twenty billion, two hundred twenty-one million, four hundred twelve thousand, seven hundred thirty-four".