228464261 has 2 divisors, whose sum is σ = 228464262. Its totient is φ = 228464260.

The previous prime is 228464161. The next prime is 228464263. The reversal of 228464261 is 162464822.

228464261 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 206468161 + 21996100 = 14369^2 + 4690^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-228464261 is a prime.

It is a super-2 number, since 2×228464261² = 104391837108552242, which contains 22 as substring.

Together with 228464263, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (228464263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114232130 + 114232131.

It is an arithmetic number, because the mean of its divisors is an integer number (114232131).

Almost surely, 2^228464261 is an apocalyptic number.

It is an amenable number.

228464261 is a deficient number, since it is larger than the sum of its proper divisors (1).

228464261 is an equidigital number, since it uses as much as digits as its factorization.

228464261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36864, while the sum is 35.

The square root of 228464261 is about 15115.0342705533. The cubic root of 228464261 is about 611.3258458946.

The spelling of 228464261 in words is "two hundred twenty-eight million, four hundred sixty-four thousand, two hundred sixty-one".