404256553 has 4 divisors (see below), whose sum is σ = 409794388. Its totient is φ = 398718720.

The previous prime is 404256551. The next prime is 404256569. The reversal of 404256553 is 355652404.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 301091904 + 103164649 = 17352^2 + 10157^2 .

It is a cyclic number.

It is not a de Polignac number, because 404256553 - 2¹ = 404256551 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (404256551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2768808 + ... + 2768953.

It is an arithmetic number, because the mean of its divisors is an integer number (102448597).

Almost surely, 2^404256553 is an apocalyptic number.

It is an amenable number.

404256553 is a deficient number, since it is larger than the sum of its proper divisors (5537835).

404256553 is an equidigital number, since it uses as much as digits as its factorization.

404256553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5537834.

The product of its (nonzero) digits is 72000, while the sum is 34.

The square root of 404256553 is about 20106.1322237769. The cubic root of 404256553 is about 739.4106294563.

The spelling of 404256553 in words is "four hundred four million, two hundred fifty-six thousand, five hundred fifty-three".