228145137 has 12 divisors (see below), whose sum is σ = 334362000. Its totient is φ = 138269560.

The previous prime is 228145123. The next prime is 228145187. The reversal of 228145137 is 731541822.

It is not a de Polignac number, because 228145137 - 2⁴ = 228145121 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a junction number, because it is equal to n+sod(n) for n = 228145098 and 228145107.

It is not an unprimeable number, because it can be changed into a prime (228145187) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 313887 + ... + 314612.

It is an arithmetic number, because the mean of its divisors is an integer number (27863500).

Almost surely, 2^228145137 is an apocalyptic number.

It is an amenable number.

228145137 is a deficient number, since it is larger than the sum of its proper divisors (106216863).

228145137 is a wasteful number, since it uses less digits than its factorization.

228145137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 628524 (or 628513 counting only the distinct ones).

The product of its digits is 13440, while the sum is 33.

The square root of 228145137 is about 15104.4740722741. The cubic root of 228145137 is about 611.0410753813.

Adding to 228145137 its reverse (731541822), we get a palindrome (959686959).

The spelling of 228145137 in words is "two hundred twenty-eight million, one hundred forty-five thousand, one hundred thirty-seven".