228130013 has 4 divisors (see below), whose sum is σ = 230388828. Its totient is φ = 225871200.

The previous prime is 228130003. The next prime is 228130033. The reversal of 228130013 is 310031822.

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

It can be written as a sum of positive squares in 2 ways, for example, as 185449924 + 42680089 = 13618^2 + 6533^2 .

It is a cyclic number.

It is not a de Polignac number, because 228130013 - 2¹² = 228125917 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228130003) 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, 1129256 + ... + 1129457.

It is an arithmetic number, because the mean of its divisors is an integer number (57597207).

Almost surely, 2^228130013 is an apocalyptic number.

It is an amenable number.

228130013 is a deficient number, since it is larger than the sum of its proper divisors (2258815).

228130013 is a wasteful number, since it uses less digits than its factorization.

228130013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2258814.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 228130013 is about 15103.9734176143. The cubic root of 228130013 is about 611.0275728809.

Adding to 228130013 its reverse (310031822), we get a palindrome (538161835).

The spelling of 228130013 in words is "two hundred twenty-eight million, one hundred thirty thousand, thirteen".