228602261 has 2 divisors, whose sum is σ = 228602262. Its totient is φ = 228602260.

The previous prime is 228602249. The next prime is 228602263. The reversal of 228602261 is 162206822.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 128482225 + 100120036 = 11335^2 + 10006^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-228602261 is a prime.

Together with 228602263, 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 (228602263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114301130 + 114301131.

It is an arithmetic number, because the mean of its divisors is an integer number (114301131).

Almost surely, 2^228602261 is an apocalyptic number.

It is an amenable number.

228602261 is a deficient number, since it is larger than the sum of its proper divisors (1).

228602261 is an equidigital number, since it uses as much as digits as its factorization.

228602261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 228602261 is about 15119.5985727135. The cubic root of 228602261 is about 611.4489081568.

The spelling of 228602261 in words is "two hundred twenty-eight million, six hundred two thousand, two hundred sixty-one".