228121154 has 8 divisors (see below), whose sum is σ = 347001408. Its totient is φ = 112454020.

The previous prime is 228121141. The next prime is 228121183. The reversal of 228121154 is 451121822.

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

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 803102 + ... + 803385.

It is an arithmetic number, because the mean of its divisors is an integer number (43375176).

Almost surely, 2^228121154 is an apocalyptic number.

228121154 is a deficient number, since it is larger than the sum of its proper divisors (118880254).

228121154 is a wasteful number, since it uses less digits than its factorization.

228121154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1606560.

The product of its digits is 1280, while the sum is 26.

The square root of 228121154 is about 15103.6801475667. The cubic root of 228121154 is about 611.0196634097.

Adding to 228121154 its reverse (451121822), we get a palindrome (679242976).

The spelling of 228121154 in words is "two hundred twenty-eight million, one hundred twenty-one thousand, one hundred fifty-four".