228551 has 8 divisors (see below), whose sum is σ = 251520. Its totient is φ = 206712.

The previous prime is 228539. The next prime is 228559. The reversal of 228551 is 155822.

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

It is a cyclic number.

It is not a de Polignac number, because 228551 - 2¹⁴ = 212167 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228559) 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, 176 + ... + 698.

It is an arithmetic number, because the mean of its divisors is an integer number (31440).

2²²⁸⁵⁵¹ is an apocalyptic number.

228551 is a deficient number, since it is larger than the sum of its proper divisors (22969).

228551 is a wasteful number, since it uses less digits than its factorization.

228551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 565.

The product of its digits is 800, while the sum is 23.

The square root of 228551 is about 478.0700785450. The cubic root of 228551 is about 61.1403201660.

The spelling of 228551 in words is "two hundred twenty-eight thousand, five hundred fifty-one".