227611985 has 4 divisors (see below), whose sum is σ = 273134388. Its totient is φ = 182089584.

The previous prime is 227611973. The next prime is 227611987. The reversal of 227611985 is 589116722.

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

It can be written as a sum of positive squares in 2 ways, for example, as 150013504 + 77598481 = 12248^2 + 8809^2 .

It is a cyclic number.

It is not a de Polignac number, because 227611985 - 2¹⁰ = 227610961 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (227611987) 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, 22761194 + ... + 22761203.

It is an arithmetic number, because the mean of its divisors is an integer number (68283597).

Almost surely, 2^227611985 is an apocalyptic number.

It is an amenable number.

227611985 is a deficient number, since it is larger than the sum of its proper divisors (45522403).

227611985 is an equidigital number, since it uses as much as digits as its factorization.

227611985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45522402.

The product of its digits is 60480, while the sum is 41.

The square root of 227611985 is about 15086.8149388796. The cubic root of 227611985 is about 610.5647238279.

The spelling of 227611985 in words is "two hundred twenty-seven million, six hundred eleven thousand, nine hundred eighty-five".