228500137 has 4 divisors (see below), whose sum is σ = 240526480. Its totient is φ = 216473796.

The previous prime is 228500117. The next prime is 228500149. The reversal of 228500137 is 731005822.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-228500137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (228500117) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6013143 + ... + 6013180.

It is an arithmetic number, because the mean of its divisors is an integer number (60131620).

Almost surely, 2^228500137 is an apocalyptic number.

It is an amenable number.

228500137 is a deficient number, since it is larger than the sum of its proper divisors (12026343).

228500137 is a wasteful number, since it uses less digits than its factorization.

228500137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12026342.

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 228500137 is about 15116.2209893875. The cubic root of 228500137 is about 611.3578432816.

Adding to 228500137 its reverse (731005822), we get a palindrome (959505959).

The spelling of 228500137 in words is "two hundred twenty-eight million, five hundred thousand, one hundred thirty-seven".