228501623 has 4 divisors (see below), whose sum is σ = 261144720. Its totient is φ = 195858528.

The previous prime is 228501601. The next prime is 228501649. The reversal of 228501623 is 326105822.

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

It is a cyclic number.

It is not a de Polignac number, because 228501623 - 2¹⁴ = 228485239 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 (228501223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16321538 + ... + 16321551.

It is an arithmetic number, because the mean of its divisors is an integer number (65286180).

Almost surely, 2^228501623 is an apocalyptic number.

228501623 is a deficient number, since it is larger than the sum of its proper divisors (32643097).

228501623 is an equidigital number, since it uses as much as digits as its factorization.

228501623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32643096.

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 228501623 is about 15116.2701418042. The cubic root of 228501623 is about 611.3591685555.

The spelling of 228501623 in words is "two hundred twenty-eight million, five hundred one thousand, six hundred twenty-three".