228036621 has 16 divisors (see below), whose sum is σ = 313737984. Its totient is φ = 147247104.

The previous prime is 228036617. The next prime is 228036631. The reversal of 228036621 is 126630822.

It is not a de Polignac number, because 228036621 - 2² = 228036617 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 (228036631) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 5341 + ... + 22013.

It is an arithmetic number, because the mean of its divisors is an integer number (19608624).

Almost surely, 2^228036621 is an apocalyptic number.

It is an amenable number.

228036621 is a deficient number, since it is larger than the sum of its proper divisors (85701363).

228036621 is a wasteful number, since it uses less digits than its factorization.

228036621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16820.

The product of its (nonzero) digits is 6912, while the sum is 30.

The square root of 228036621 is about 15100.8814643384. The cubic root of 228036621 is about 610.9441805568.

The spelling of 228036621 in words is "two hundred twenty-eight million, thirty-six thousand, six hundred twenty-one".