228317533 has 8 divisors (see below), whose sum is σ = 230981688. Its totient is φ = 225659904.

The previous prime is 228317477. The next prime is 228317567. The reversal of 228317533 is 335713822.

It can be written as a sum of positive squares in 4 ways, for example, as 11108889 + 217208644 = 3333^2 + 14738^2 .

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 228317533 - 2²¹ = 226220381 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 (228317833) 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, 114735 + ... + 116707.

It is an arithmetic number, because the mean of its divisors is an integer number (28872711).

Almost surely, 2^228317533 is an apocalyptic number.

It is an amenable number.

228317533 is a deficient number, since it is larger than the sum of its proper divisors (2664155).

228317533 is a wasteful number, since it uses less digits than its factorization.

228317533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3263.

The product of its digits is 30240, while the sum is 34.

The square root of 228317533 is about 15110.1797805321. The cubic root of 228317533 is about 611.1949460217.

The spelling of 228317533 in words is "two hundred twenty-eight million, three hundred seventeen thousand, five hundred thirty-three".