521216034342 has 16 divisors (see below), whose sum is σ = 1103751602352. Its totient is φ = 163518755840.

The previous prime is 521216034319. The next prime is 521216034343. The reversal of 521216034342 is 243430612125.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (521216034343) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2554980459 + ... + 2554980662.

It is an arithmetic number, because the mean of its divisors is an integer number (68984475147).

Almost surely, 2^521216034342 is an apocalyptic number.

521216034342 is an abundant number, since it is smaller than the sum of its proper divisors (582535568010).

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

521216034342 is a wasteful number, since it uses less digits than its factorization.

521216034342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5109961143.

The product of its (nonzero) digits is 34560, while the sum is 33.

Adding to 521216034342 its reverse (243430612125), we get a palindrome (764646646467).

The spelling of 521216034342 in words is "five hundred twenty-one billion, two hundred sixteen million, thirty-four thousand, three hundred forty-two".