228135237 has 8 divisors (see below), whose sum is σ = 331833120. Its totient is φ = 138263760.

The previous prime is 228135233. The next prime is 228135247. The reversal of 228135237 is 732531822.

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

It is not a de Polignac number, because 228135237 - 2² = 228135233 is a prime.

It is a super-2 number, since 2×228135237² = 104091372722092338, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33), and also a Moran number because the ratio is a prime number: 6913189 = 228135237 / (2 + 2 + 8 + 1 + 3 + 5 + 2 + 3 + 7).

It is a junction number, because it is equal to n+sod(n) for n = 228135198 and 228135207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228135233) 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, 3456562 + ... + 3456627.

It is an arithmetic number, because the mean of its divisors is an integer number (41479140).

Almost surely, 2^228135237 is an apocalyptic number.

It is an amenable number.

228135237 is a deficient number, since it is larger than the sum of its proper divisors (103697883).

228135237 is a wasteful number, since it uses less digits than its factorization.

228135237 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6913203.

The product of its digits is 20160, while the sum is 33.

The square root of 228135237 is about 15104.1463512507. The cubic root of 228135237 is about 611.0322368642.

The spelling of 228135237 in words is "two hundred twenty-eight million, one hundred thirty-five thousand, two hundred thirty-seven".