812242218 has 16 divisors (see below), whose sum is σ = 1720042560. Its totient is φ = 254821056.

The previous prime is 812242187. The next prime is 812242219.

812242218 is nontrivially palindromic in base 10.

It is not an unprimeable number, because it can be changed into a prime (812242219) 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, 3981478 + ... + 3981681.

It is an arithmetic number, because the mean of its divisors is an integer number (107502660).

Almost surely, 2^812242218 is an apocalyptic number.

812242218 is an abundant number, since it is smaller than the sum of its proper divisors (907800342).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

812242218 is a wasteful number, since it uses less digits than its factorization.

812242218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7963181.

The product of its digits is 4096, while the sum is 30.

The square root of 812242218 is about 28499.8634733572. The cubic root of 812242218 is about 933.0290942335.

The spelling of 812242218 in words is "eight hundred twelve million, two hundred forty-two thousand, two hundred eighteen".