228301521 has 8 divisors (see below), whose sum is σ = 347888064. Its totient is φ = 130458000.

The previous prime is 228301501. The next prime is 228301531. The reversal of 228301521 is 125103822.

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

It is not a de Polignac number, because 228301521 - 2¹⁵ = 228268753 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 228301491 and 228301500.

It is not an unprimeable number, because it can be changed into a prime (228301501) 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, 5435730 + ... + 5435771.

It is an arithmetic number, because the mean of its divisors is an integer number (43486008).

Almost surely, 2^228301521 is an apocalyptic number.

228301521 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

228301521 is a deficient number, since it is larger than the sum of its proper divisors (119586543).

228301521 is a wasteful number, since it uses less digits than its factorization.

228301521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10871511.

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 228301521 is about 15109.6499297634. The cubic root of 228301521 is about 611.1806579056.

It can be divided in two parts, 228301 and 521, that added together give a palindrome (228822).

The spelling of 228301521 in words is "two hundred twenty-eight million, three hundred one thousand, five hundred twenty-one".