404521213513 has 4 divisors (see below), whose sum is σ = 405623451520. Its totient is φ = 403418975508.

The previous prime is 404521213507. The next prime is 404521213529. The reversal of 404521213513 is 315312125404.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 404521213513 - 2²¹ = 404519116361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (404521213543) 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, 551118453 + ... + 551119186.

It is an arithmetic number, because the mean of its divisors is an integer number (101405862880).

Almost surely, 2^404521213513 is an apocalyptic number.

It is an amenable number.

404521213513 is a deficient number, since it is larger than the sum of its proper divisors (1102238007).

404521213513 is a wasteful number, since it uses less digits than its factorization.

404521213513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1102238006.

The product of its (nonzero) digits is 14400, while the sum is 31.

Adding to 404521213513 its reverse (315312125404), we get a palindrome (719833338917).

The spelling of 404521213513 in words is "four hundred four billion, five hundred twenty-one million, two hundred thirteen thousand, five hundred thirteen".