228132013 has 4 divisors (see below), whose sum is σ = 231019840. Its totient is φ = 225244188.

The previous prime is 228132011. The next prime is 228132019. The reversal of 228132013 is 310231822.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 310231822 = 2 ⋅155115911.

It is a cyclic number.

It is not a de Polignac number, because 228132013 - 2¹ = 228132011 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 (228132011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1443795 + ... + 1443952.

It is an arithmetic number, because the mean of its divisors is an integer number (57754960).

Almost surely, 2^228132013 is an apocalyptic number.

It is an amenable number.

228132013 is a deficient number, since it is larger than the sum of its proper divisors (2887827).

228132013 is an equidigital number, since it uses as much as digits as its factorization.

228132013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2887826.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 228132013 is about 15104.0396252129. The cubic root of 228132013 is about 611.0293584878.

Adding to 228132013 its reverse (310231822), we get a palindrome (538363835).

The spelling of 228132013 in words is "two hundred twenty-eight million, one hundred thirty-two thousand, thirteen".