228551533 has 16 divisors (see below), whose sum is σ = 267212800. Its totient is φ = 195401808.

The previous prime is 228551509. The next prime is 228551537. The reversal of 228551533 is 335155822.

It is not a de Polignac number, because 228551533 - 2²¹ = 226454381 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 (228551537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 209716 + ... + 210802.

It is an arithmetic number, because the mean of its divisors is an integer number (16700800).

Almost surely, 2^228551533 is an apocalyptic number.

It is an amenable number.

228551533 is a deficient number, since it is larger than the sum of its proper divisors (38661267).

228551533 is an equidigital number, since it uses as much as digits as its factorization.

228551533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1721 (or 1707 counting only the distinct ones).

The product of its digits is 36000, while the sum is 34.

The square root of 228551533 is about 15117.9209218728. The cubic root of 228551533 is about 611.4036769407.

The spelling of 228551533 in words is "two hundred twenty-eight million, five hundred fifty-one thousand, five hundred thirty-three".