228282021 has 24 divisors (see below), whose sum is σ = 360516000. Its totient is φ = 138045600.

The previous prime is 228282013. The next prime is 228282029. The reversal of 228282021 is 120282822.

It is an interprime number because it is at equal distance from previous prime (228282013) and next prime (228282029).

It is not a de Polignac number, because 228282021 - 2³ = 228282013 is a prime.

It is a super-2 number, since 2×228282021² = 104225362223688882, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228282029) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 47091 + ... + 51711.

It is an arithmetic number, because the mean of its divisors is an integer number (15021500).

Almost surely, 2^228282021 is an apocalyptic number.

It is an amenable number.

228282021 is a deficient number, since it is larger than the sum of its proper divisors (132233979).

228282021 is a wasteful number, since it uses less digits than its factorization.

228282021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5137 (or 5134 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 27.

The square root of 228282021 is about 15109.0046329995. The cubic root of 228282021 is about 611.1632564123.

The spelling of 228282021 in words is "two hundred twenty-eight million, two hundred eighty-two thousand, twenty-one".