404425502221 has 10 divisors (see below), whose sum is σ = 438126478342. Its totient is φ = 373315821840.

The previous prime is 404425502219. The next prime is 404425502311. The reversal of 404425502221 is 122205524404.

It can be written as a sum of positive squares in 5 ways, for example, as 315266528196 + 89158974025 = 561486^2 + 298595^2 .

It is not a de Polignac number, because 404425502221 - 2¹ = 404425502219 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404425509221) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 7051470 + ... + 7108591.

Almost surely, 2^404425502221 is an apocalyptic number.

It is an amenable number.

404425502221 is a deficient number, since it is larger than the sum of its proper divisors (33700976121).

404425502221 is an frugal number, since it uses more digits than its factorization.

404425502221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14160113 (or 14160074 counting only the distinct ones).

The product of its (nonzero) digits is 25600, while the sum is 31.

The spelling of 404425502221 in words is "four hundred four billion, four hundred twenty-five million, five hundred two thousand, two hundred twenty-one".