228216031 has 8 divisors (see below), whose sum is σ = 231620000. Its totient is φ = 224819712.

The previous prime is 228216013. The next prime is 228216059. The reversal of 228216031 is 130612822.

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 228216031 - 2¹¹ = 228213983 is a prime.

It is a super-2 number, since 2×228216031² = 104165113610785922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 228215987 and 228216005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228216061) 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 7 ways as a sum of consecutive naturals, for example, 89926 + ... + 92428.

It is an arithmetic number, because the mean of its divisors is an integer number (28952500).

Almost surely, 2^228216031 is an apocalyptic number.

228216031 is a deficient number, since it is larger than the sum of its proper divisors (3403969).

228216031 is a wasteful number, since it uses less digits than its factorization.

228216031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3825.

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 228216031 is about 15106.8206780911. The cubic root of 228216031 is about 611.1043606221.

Adding to 228216031 its reverse (130612822), we get a palindrome (358828853).

The spelling of 228216031 in words is "two hundred twenty-eight million, two hundred sixteen thousand, thirty-one".