228202813 has 8 divisors (see below), whose sum is σ = 234114048. Its totient is φ = 222335664.

The previous prime is 228202739. The next prime is 228202831. The reversal of 228202813 is 318202822.

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

It is a cyclic number.

It is not a de Polignac number, because 228202813 - 2⁹ = 228202301 is a prime.

It is a super-2 number, since 2×228202813² = 104153047722225938, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228202213) 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, 406 + ... + 21367.

It is an arithmetic number, because the mean of its divisors is an integer number (29264256).

Almost surely, 2^228202813 is an apocalyptic number.

It is an amenable number.

228202813 is a deficient number, since it is larger than the sum of its proper divisors (5911235).

228202813 is a wasteful number, since it uses less digits than its factorization.

228202813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22043.

The product of its (nonzero) digits is 3072, while the sum is 28.

The square root of 228202813 is about 15106.3831872490. The cubic root of 228202813 is about 611.0925622494.

Subtracting 228202813 from its reverse (318202822), we obtain a palindrome (90000009).

The spelling of 228202813 in words is "two hundred twenty-eight million, two hundred two thousand, eight hundred thirteen".