404220553 has 8 divisors (see below), whose sum is σ = 444441600. Its totient is φ = 364578480.

The previous prime is 404220547. The next prime is 404220571. The reversal of 404220553 is 355022404.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-404220553 is a prime.

It is a super-3 number, since 3×404220553³ (a number of 27 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (404220853) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 143278 + ... + 146071.

It is an arithmetic number, because the mean of its divisors is an integer number (55555200).

Almost surely, 2^404220553 is an apocalyptic number.

It is an amenable number.

404220553 is a deficient number, since it is larger than the sum of its proper divisors (40221047).

404220553 is a wasteful number, since it uses less digits than its factorization.

404220553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 289487.

The product of its (nonzero) digits is 4800, while the sum is 25.

The square root of 404220553 is about 20105.2369545847. The cubic root of 404220553 is about 739.3886800509.

Adding to 404220553 its reverse (355022404), we get a palindrome (759242957).

The spelling of 404220553 in words is "four hundred four million, two hundred twenty thousand, five hundred fifty-three".