404221220413523 has 4 divisors (see below), whose sum is σ = 404221266560880. Its totient is φ = 404221174266168.

The previous prime is 404221220413513. The next prime is 404221220413531. The reversal of 404221220413523 is 325314022122404.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 404221220413523 - 2⁶ = 404221220413459 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (404221220413513) 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, 5445215 + ... + 28949832.

It is an arithmetic number, because the mean of its divisors is an integer number (101055316640220).

Almost surely, 2^{404221220413523} is an apocalyptic number.

404221220413523 is a deficient number, since it is larger than the sum of its proper divisors (46147357).

404221220413523 is a wasteful number, since it uses less digits than its factorization.

404221220413523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46147356.

The product of its (nonzero) digits is 92160, while the sum is 35.

Adding to 404221220413523 its reverse (325314022122404), we get a palindrome (729535242535927).

The spelling of 404221220413523 in words is "four hundred four trillion, two hundred twenty-one billion, two hundred twenty million, four hundred thirteen thousand, five hundred twenty-three".