228321501 has 4 divisors (see below), whose sum is σ = 304428672. Its totient is φ = 152214332.

The previous prime is 228321451. The next prime is 228321503. The reversal of 228321501 is 105123822.

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.

It is a cyclic number.

It is not a de Polignac number, because 228321501 - 2²⁶ = 161212637 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228321503) 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, 38053581 + ... + 38053586.

It is an arithmetic number, because the mean of its divisors is an integer number (76107168).

Almost surely, 2^228321501 is an apocalyptic number.

It is an amenable number.

228321501 is a deficient number, since it is larger than the sum of its proper divisors (76107171).

228321501 is an equidigital number, since it uses as much as digits as its factorization.

228321501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76107170.

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 228321501 is about 15110.3110821717. The cubic root of 228321501 is about 611.1984867157.

It can be divided in two parts, 228321 and 501, that added together give a palindrome (228822).

The spelling of 228321501 in words is "two hundred twenty-eight million, three hundred twenty-one thousand, five hundred one".