228317465 has 4 divisors (see below), whose sum is σ = 273980964. Its totient is φ = 182653968.

The previous prime is 228317461. The next prime is 228317473. The reversal of 228317465 is 564713822.

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: 564713822 = 2 ⋅282356911.

It can be written as a sum of positive squares in 2 ways, for example, as 29986576 + 198330889 = 5476^2 + 14083^2 .

It is a cyclic number.

It is not a de Polignac number, because 228317465 - 2² = 228317461 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (228317461) 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, 22831742 + ... + 22831751.

It is an arithmetic number, because the mean of its divisors is an integer number (68495241).

Almost surely, 2^228317465 is an apocalyptic number.

It is an amenable number.

228317465 is a deficient number, since it is larger than the sum of its proper divisors (45663499).

228317465 is an equidigital number, since it uses as much as digits as its factorization.

228317465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45663498.

The product of its digits is 80640, while the sum is 38.

The square root of 228317465 is about 15110.1775303932. The cubic root of 228317465 is about 611.1948853442.

The spelling of 228317465 in words is "two hundred twenty-eight million, three hundred seventeen thousand, four hundred sixty-five".