228323261 has 4 divisors (see below), whose sum is σ = 228606300. Its totient is φ = 228040224.

The previous prime is 228323239. The next prime is 228323273. The reversal of 228323261 is 162323822.

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

It can be written as a sum of positive squares in 2 ways, for example, as 169494361 + 58828900 = 13019^2 + 7670^2 .

It is a cyclic number.

It is not a de Polignac number, because 228323261 - 2¹⁴ = 228306877 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 (228323761) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 140306 + ... + 141923.

It is an arithmetic number, because the mean of its divisors is an integer number (57151575).

Almost surely, 2^228323261 is an apocalyptic number.

It is an amenable number.

228323261 is a deficient number, since it is larger than the sum of its proper divisors (283039).

228323261 is an equidigital number, since it uses as much as digits as its factorization.

228323261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 283038.

The product of its digits is 6912, while the sum is 29.

The square root of 228323261 is about 15110.3693204369. The cubic root of 228323261 is about 611.2000571716.

The spelling of 228323261 in words is "two hundred twenty-eight million, three hundred twenty-three thousand, two hundred sixty-one".