228652291 has 4 divisors (see below), whose sum is σ = 261316912. Its totient is φ = 195987672.

The previous prime is 228652189. The next prime is 228652309. The reversal of 228652291 is 192256822.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 192256822 = 2 ⋅96128411.

It is a cyclic number.

It is not a de Polignac number, because 228652291 - 2¹³ = 228644099 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 228652291.

It is not an unprimeable number, because it can be changed into a prime (228652891) 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, 16332300 + ... + 16332313.

It is an arithmetic number, because the mean of its divisors is an integer number (65329228).

Almost surely, 2^228652291 is an apocalyptic number.

228652291 is a deficient number, since it is larger than the sum of its proper divisors (32664621).

228652291 is an equidigital number, since it uses as much as digits as its factorization.

228652291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32664620.

The product of its digits is 34560, while the sum is 37.

The square root of 228652291 is about 15121.2529573445. The cubic root of 228652291 is about 611.4935104534.

The spelling of 228652291 in words is "two hundred twenty-eight million, six hundred fifty-two thousand, two hundred ninety-one".