228145136 has 20 divisors (see below), whose sum is σ = 443720112. Its totient is φ = 113636736.

The previous prime is 228145123. The next prime is 228145187. The reversal of 228145136 is 631541822.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22901 + ... + 31316.

Almost surely, 2^228145136 is an apocalyptic number.

It is an amenable number.

228145136 is a deficient number, since it is larger than the sum of its proper divisors (215574976).

228145136 is a wasteful number, since it uses less digits than its factorization.

228145136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54488 (or 54482 counting only the distinct ones).

The product of its digits is 11520, while the sum is 32.

The square root of 228145136 is about 15104.4740391713. The cubic root of 228145136 is about 611.0410744886.

Adding to 228145136 its reverse (631541822), we get a palindrome (859686958).

The spelling of 228145136 in words is "two hundred twenty-eight million, one hundred forty-five thousand, one hundred thirty-six".