228078961 has 4 divisors (see below), whose sum is σ = 248813424. Its totient is φ = 207344500.

The previous prime is 228078959. The next prime is 228079013. The reversal of 228078961 is 169870822.

228078961 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 228078961 - 2¹ = 228078959 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (228078901) 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, 10367215 + ... + 10367236.

It is an arithmetic number, because the mean of its divisors is an integer number (62203356).

Almost surely, 2^228078961 is an apocalyptic number.

It is an amenable number.

228078961 is a deficient number, since it is larger than the sum of its proper divisors (20734463).

228078961 is a wasteful number, since it uses less digits than its factorization.

228078961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20734462.

The product of its (nonzero) digits is 96768, while the sum is 43.

The square root of 228078961 is about 15102.2833041895. The cubic root of 228078961 is about 610.9819899456.

The spelling of 228078961 in words is "two hundred twenty-eight million, seventy-eight thousand, nine hundred sixty-one".