228515165947 has 4 divisors (see below), whose sum is σ = 231645510760. Its totient is φ = 225384821136.

The previous prime is 228515165803. The next prime is 228515165951. The reversal of 228515165947 is 749561515822.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-228515165947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (228515165987) 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, 1565172297 + ... + 1565172442.

It is an arithmetic number, because the mean of its divisors is an integer number (57911377690).

Almost surely, 2^228515165947 is an apocalyptic number.

228515165947 is a deficient number, since it is larger than the sum of its proper divisors (3130344813).

228515165947 is an equidigital number, since it uses as much as digits as its factorization.

228515165947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3130344812.

The product of its digits is 6048000, while the sum is 55.

The spelling of 228515165947 in words is "two hundred twenty-eight billion, five hundred fifteen million, one hundred sixty-five thousand, nine hundred forty-seven".