228161207 has 4 divisors (see below), whose sum is σ = 229108176. Its totient is φ = 227214240.

The previous prime is 228161191. The next prime is 228161221. The reversal of 228161207 is 702161822.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 702161822 = 2 ⋅351080911.

It is a cyclic number.

It is not a de Polignac number, because 228161207 - 2⁴ = 228161191 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 228161207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228161407) 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, 473123 + ... + 473604.

It is an arithmetic number, because the mean of its divisors is an integer number (57277044).

Almost surely, 2^228161207 is an apocalyptic number.

228161207 is a deficient number, since it is larger than the sum of its proper divisors (946969).

228161207 is an equidigital number, since it uses as much as digits as its factorization.

228161207 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 946968.

The product of its (nonzero) digits is 2688, while the sum is 29.

The square root of 228161207 is about 15105.0060244940. The cubic root of 228161207 is about 611.0554218038.

The spelling of 228161207 in words is "two hundred twenty-eight million, one hundred sixty-one thousand, two hundred seven".