228145007 has 4 divisors (see below), whose sum is σ = 228176016. Its totient is φ = 228114000.

The previous prime is 228144977. The next prime is 228145013. The reversal of 228145007 is 700541822.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 228145007 - 2²⁰ = 227096431 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228145807) 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, 2507 + ... + 21507.

It is an arithmetic number, because the mean of its divisors is an integer number (57044004).

Almost surely, 2^228145007 is an apocalyptic number.

228145007 is a deficient number, since it is larger than the sum of its proper divisors (31009).

228145007 is a wasteful number, since it uses less digits than its factorization.

228145007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31008.

The product of its (nonzero) digits is 4480, while the sum is 29.

The square root of 228145007 is about 15104.4697689128. The cubic root of 228145007 is about 611.0409593217.

Adding to 228145007 its reverse (700541822), we get a palindrome (928686829).

The spelling of 228145007 in words is "two hundred twenty-eight million, one hundred forty-five thousand, seven".