228721063 has 4 divisors (see below), whose sum is σ = 229199040. Its totient is φ = 228243088.

The previous prime is 228721027. The next prime is 228721067. The reversal of 228721063 is 360127822.

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

It is a cyclic number.

It is not a de Polignac number, because 228721063 - 2⁹ = 228720551 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 (228721067) 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, 238270 + ... + 239227.

It is an arithmetic number, because the mean of its divisors is an integer number (57299760).

Almost surely, 2^228721063 is an apocalyptic number.

228721063 is a deficient number, since it is larger than the sum of its proper divisors (477977).

228721063 is an equidigital number, since it uses as much as digits as its factorization.

228721063 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 477976.

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 228721063 is about 15123.5268042874. The cubic root of 228721063 is about 611.5548108323.

Adding to 228721063 its reverse (360127822), we get a palindrome (588848885).

The spelling of 228721063 in words is "two hundred twenty-eight million, seven hundred twenty-one thousand, sixty-three".