228996331 has 4 divisors (see below), whose sum is σ = 229387032. Its totient is φ = 228605632.

The previous prime is 228996329. The next prime is 228996353. The reversal of 228996331 is 133699822.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 228996331 - 2¹ = 228996329 is a prime.

It is a super-2 number, since 2×228996331² = 104878639222923122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (228996631) 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, 194470 + ... + 195643.

It is an arithmetic number, because the mean of its divisors is an integer number (57346758).

Almost surely, 2^228996331 is an apocalyptic number.

228996331 is a deficient number, since it is larger than the sum of its proper divisors (390701).

228996331 is an equidigital number, since it uses as much as digits as its factorization.

228996331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 390700.

The product of its digits is 139968, while the sum is 43.

The square root of 228996331 is about 15132.6247227637. The cubic root of 228996331 is about 611.8000498425.

The spelling of 228996331 in words is "two hundred twenty-eight million, nine hundred ninety-six thousand, three hundred thirty-one".