228326261 has 4 divisors (see below), whose sum is σ = 231454092. Its totient is φ = 225198432.

The previous prime is 228326257. The next prime is 228326281. The reversal of 228326261 is 162623822.

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 127825636 + 100500625 = 11306^2 + 10025^2 .

It is a cyclic number.

It is not a de Polignac number, because 228326261 - 2² = 228326257 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228326281) 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, 1563806 + ... + 1563951.

It is an arithmetic number, because the mean of its divisors is an integer number (57863523).

Almost surely, 2^228326261 is an apocalyptic number.

It is an amenable number.

228326261 is a deficient number, since it is larger than the sum of its proper divisors (3127831).

228326261 is an equidigital number, since it uses as much as digits as its factorization.

228326261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3127830.

The product of its digits is 13824, while the sum is 32.

The square root of 228326261 is about 15110.4685896897. The cubic root of 228326261 is about 611.2027340665.

The spelling of 228326261 in words is "two hundred twenty-eight million, three hundred twenty-six thousand, two hundred sixty-one".