228288061 has 4 divisors (see below), whose sum is σ = 235652224. Its totient is φ = 220923900.

The previous prime is 228288043. The next prime is 228288079. The reversal of 228288061 is 160882822.

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: 160882822 = 2 ⋅80441411.

It is an interprime number because it is at equal distance from previous prime (228288043) and next prime (228288079).

It is a cyclic number.

It is not a de Polignac number, because 228288061 - 2¹³ = 228279869 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 228288061.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228288091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3682035 + ... + 3682096.

It is an arithmetic number, because the mean of its divisors is an integer number (58913056).

Almost surely, 2^228288061 is an apocalyptic number.

It is an amenable number.

228288061 is a deficient number, since it is larger than the sum of its proper divisors (7364163).

228288061 is an equidigital number, since it uses as much as digits as its factorization.

228288061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7364162.

The product of its (nonzero) digits is 24576, while the sum is 37.

The square root of 228288061 is about 15109.2045124818. The cubic root of 228288061 is about 611.1686465193.

The spelling of 228288061 in words is "two hundred twenty-eight million, two hundred eighty-eight thousand, sixty-one".