228737161 has 2 divisors, whose sum is σ = 228737162. Its totient is φ = 228737160.

The previous prime is 228737111. The next prime is 228737233. The reversal of 228737161 is 161737822.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 185913225 + 42823936 = 13635^2 + 6544^2 .

It is a cyclic number.

It is not a de Polignac number, because 228737161 - 2²³ = 220348553 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 228737161.

It is not a weakly prime, because it can be changed into another prime (228737111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114368580 + 114368581.

It is an arithmetic number, because the mean of its divisors is an integer number (114368581).

Almost surely, 2^228737161 is an apocalyptic number.

It is an amenable number.

228737161 is a deficient number, since it is larger than the sum of its proper divisors (1).

228737161 is an equidigital number, since it uses as much as digits as its factorization.

228737161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 28224, while the sum is 37.

The square root of 228737161 is about 15124.0590120510. The cubic root of 228737161 is about 611.5691581167.

The spelling of 228737161 in words is "two hundred twenty-eight million, seven hundred thirty-seven thousand, one hundred sixty-one".