228423961 has 2 divisors, whose sum is σ = 228423962. Its totient is φ = 228423960.

The previous prime is 228423959. The next prime is 228423983. The reversal of 228423961 is 169324822.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 133263936 + 95160025 = 11544^2 + 9755^2 .

It is a cyclic number.

It is not a de Polignac number, because 228423961 - 2¹ = 228423959 is a prime.

Together with 228423959, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 228423961.

It is not a weakly prime, because it can be changed into another prime (228423931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114211980 + 114211981.

It is an arithmetic number, because the mean of its divisors is an integer number (114211981).

Almost surely, 2^228423961 is an apocalyptic number.

It is an amenable number.

228423961 is a deficient number, since it is larger than the sum of its proper divisors (1).

228423961 is an equidigital number, since it uses as much as digits as its factorization.

228423961 is an evil number, because the sum of its binary digits is even.

The product of its digits is 41472, while the sum is 37.

The square root of 228423961 is about 15113.7011019803. The cubic root of 228423961 is about 611.2898987984.

The spelling of 228423961 in words is "two hundred twenty-eight million, four hundred twenty-three thousand, nine hundred sixty-one".