228851465 has 4 divisors (see below), whose sum is σ = 274621764. Its totient is φ = 183081168.

The previous prime is 228851411. The next prime is 228851473. The reversal of 228851465 is 564158822.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 564158822 = 2 ⋅282079411.

It can be written as a sum of positive squares in 2 ways, for example, as 44462224 + 184389241 = 6668^2 + 13579^2 .

It is a cyclic number.

It is not a de Polignac number, because 228851465 - 2²⁰ = 227802889 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22885142 + ... + 22885151.

It is an arithmetic number, because the mean of its divisors is an integer number (68655441).

Almost surely, 2^228851465 is an apocalyptic number.

It is an amenable number.

228851465 is a deficient number, since it is larger than the sum of its proper divisors (45770299).

228851465 is an equidigital number, since it uses as much as digits as its factorization.

228851465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45770298.

The product of its digits is 153600, while the sum is 41.

The square root of 228851465 is about 15127.8374198033. The cubic root of 228851465 is about 611.6710117898.

The spelling of 228851465 in words is "two hundred twenty-eight million, eight hundred fifty-one thousand, four hundred sixty-five".