228121653 has 8 divisors (see below), whose sum is σ = 313974016. Its totient is φ = 147175200.

The previous prime is 228121637. The next prime is 228121693. The reversal of 228121653 is 356121822.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 228121653 - 2⁴ = 228121637 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 228121653.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228121603) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1226368 + ... + 1226553.

It is an arithmetic number, because the mean of its divisors is an integer number (39246752).

Almost surely, 2^228121653 is an apocalyptic number.

It is an amenable number.

228121653 is a deficient number, since it is larger than the sum of its proper divisors (85852363).

228121653 is a wasteful number, since it uses less digits than its factorization.

228121653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2452955.

The product of its digits is 5760, while the sum is 30.

The square root of 228121653 is about 15103.6966667104. The cubic root of 228121653 is about 611.0201089311.

The spelling of 228121653 in words is "two hundred twenty-eight million, one hundred twenty-one thousand, six hundred fifty-three".