1918227 has 8 divisors (see below), whose sum is σ = 2571664. Its totient is φ = 1271808.

The previous prime is 1918219. The next prime is 1918237. The reversal of 1918227 is 7228191.

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

It is not a de Polignac number, because 1918227 - 2³ = 1918219 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1918194 and 1918203.

It is not an unprimeable number, because it can be changed into a prime (1918237) 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, 1078 + ... + 2235.

It is an arithmetic number, because the mean of its divisors is an integer number (321458).

2^1918227 is an apocalyptic number.

1918227 is a deficient number, since it is larger than the sum of its proper divisors (653437).

1918227 is a wasteful number, since it uses less digits than its factorization.

1918227 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3509.

The product of its digits is 2016, while the sum is 30.

The square root of 1918227 is about 1385.0007220215. Note that the first 3 decimals coincide. The cubic root of 1918227 is about 124.2510306557.

It can be divided in two parts, 1918 and 227, that added together give a triangular number (2145 = T₆₅).

The spelling of 1918227 in words is "one million, nine hundred eighteen thousand, two hundred twenty-seven".