521045343320331 has 32 divisors (see below), whose sum is σ = 703869887669760. Its totient is φ = 342807103584000.

The previous prime is 521045343320291. The next prime is 521045343320377. The reversal of 521045343320331 is 133023343540125.

It is not a de Polignac number, because 521045343320331 - 2¹⁸ = 521045343058187 is a prime.

It is a super-2 number, since 2×521045343320331² (a number of 30 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 521045343320331.

It is not an unprimeable number, because it can be changed into a prime (521045343322331) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2968442536 + ... + 2968618058.

It is an arithmetic number, because the mean of its divisors is an integer number (21995933989680).

Almost surely, 2^{521045343320331} is an apocalyptic number.

521045343320331 is a deficient number, since it is larger than the sum of its proper divisors (182824544349429).

521045343320331 is a wasteful number, since it uses less digits than its factorization.

521045343320331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196707.

The product of its (nonzero) digits is 388800, while the sum is 39.

Adding to 521045343320331 its reverse (133023343540125), we get a palindrome (654068686860456).

The spelling of 521045343320331 in words is "five hundred twenty-one trillion, forty-five billion, three hundred forty-three million, three hundred twenty thousand, three hundred thirty-one".