228051021 has 8 divisors (see below), whose sum is σ = 331710624. Its totient is φ = 138212720.

The previous prime is 228051007. The next prime is 228051029. The reversal of 228051021 is 120150822.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 228051021 - 2¹⁸ = 227788877 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228051029) 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, 3455286 + ... + 3455351.

It is an arithmetic number, because the mean of its divisors is an integer number (41463828).

Almost surely, 2^228051021 is an apocalyptic number.

It is an amenable number.

228051021 is a deficient number, since it is larger than the sum of its proper divisors (103659603).

228051021 is a wasteful number, since it uses less digits than its factorization.

228051021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6910651.

The product of its (nonzero) digits is 320, while the sum is 21.

The square root of 228051021 is about 15101.3582501707. The cubic root of 228051021 is about 610.9570402033.

It can be divided in two parts, 2280 and 51021, that added together give a triangular number (53301 = T₃₂₆).

The spelling of 228051021 in words is "two hundred twenty-eight million, fifty-one thousand, twenty-one".