228144145 has 4 divisors (see below), whose sum is σ = 273772980. Its totient is φ = 182515312.

The previous prime is 228144139. The next prime is 228144151. The reversal of 228144145 is 541441822.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (228144139) and next prime (228144151).

It can be written as a sum of positive squares in 2 ways, for example, as 156775441 + 71368704 = 12521^2 + 8448^2 .

It is a cyclic number.

It is not a de Polignac number, because 228144145 - 2⁷ = 228144017 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22814410 + ... + 22814419.

It is an arithmetic number, because the mean of its divisors is an integer number (68443245).

Almost surely, 2^228144145 is an apocalyptic number.

It is an amenable number.

228144145 is a deficient number, since it is larger than the sum of its proper divisors (45628835).

228144145 is an equidigital number, since it uses as much as digits as its factorization.

228144145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45628834.

The product of its digits is 10240, while the sum is 31.

The square root of 228144145 is about 15104.4412342860. The cubic root of 228144145 is about 611.0401897556.

Adding to 228144145 its reverse (541441822), we get a palindrome (769585967).

The spelling of 228144145 in words is "two hundred twenty-eight million, one hundred forty-four thousand, one hundred forty-five".