228250805 has 4 divisors (see below), whose sum is σ = 273900972. Its totient is φ = 182600640.

The previous prime is 228250801. The next prime is 228250849. The reversal of 228250805 is 508052822.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 508052822 = 2 ⋅254026411.

It can be written as a sum of positive squares in 2 ways, for example, as 62948356 + 165302449 = 7934^2 + 12857^2 .

It is not a de Polignac number, because 228250805 - 2² = 228250801 is a prime.

It is a Duffinian number.

It is a plaindrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228250801) 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, 22825076 + ... + 22825085.

It is an arithmetic number, because the mean of its divisors is an integer number (68475243).

Almost surely, 2^228250805 is an apocalyptic number.

It is an amenable number.

228250805 is a deficient number, since it is larger than the sum of its proper divisors (45650167).

228250805 is an equidigital number, since it uses as much as digits as its factorization.

228250805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45650166.

The product of its (nonzero) digits is 12800, while the sum is 32.

The square root of 228250805 is about 15107.9715713262. The cubic root of 228250805 is about 611.1353976819.

The spelling of 228250805 in words is "two hundred twenty-eight million, two hundred fifty thousand, eight hundred five".