228837021 has 8 divisors (see below), whose sum is σ = 348704064. Its totient is φ = 130764000.

The previous prime is 228837019. The next prime is 228837023. The reversal of 228837021 is 120738822.

It is an interprime number because it is at equal distance from previous prime (228837019) and next prime (228837023).

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

It is not a de Polignac number, because 228837021 - 2¹ = 228837019 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 (228837023) 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, 5448480 + ... + 5448521.

It is an arithmetic number, because the mean of its divisors is an integer number (43588008).

Almost surely, 2^228837021 is an apocalyptic number.

228837021 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

228837021 is a deficient number, since it is larger than the sum of its proper divisors (119867043).

228837021 is a wasteful number, since it uses less digits than its factorization.

228837021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10897011.

The product of its (nonzero) digits is 10752, while the sum is 33.

The square root of 228837021 is about 15127.3600142259. The cubic root of 228837021 is about 611.6581429450.

The spelling of 228837021 in words is "two hundred twenty-eight million, eight hundred thirty-seven thousand, twenty-one".