228638553 has 32 divisors (see below), whose sum is σ = 364060032. Its totient is φ = 125798400.

The previous prime is 228638551. The next prime is 228638573. The reversal of 228638553 is 355836822.

It is not a de Polignac number, because 228638553 - 2¹ = 228638551 is a prime.

It is not an unprimeable number, because it can be changed into a prime (228638551) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21801 + ... + 30537.

It is an arithmetic number, because the mean of its divisors is an integer number (11376876).

Almost surely, 2^228638553 is an apocalyptic number.

It is an amenable number.

228638553 is a deficient number, since it is larger than the sum of its proper divisors (135421479).

228638553 is a wasteful number, since it uses less digits than its factorization.

228638553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8825.

The product of its digits is 345600, while the sum is 42.

The square root of 228638553 is about 15120.7986892227. The cubic root of 228638553 is about 611.4812635230.

The spelling of 228638553 in words is "two hundred twenty-eight million, six hundred thirty-eight thousand, five hundred fifty-three".