218045412 has 48 divisors (see below), whose sum is σ = 608791680. Its totient is φ = 67090464.

The previous prime is 218045407. The next prime is 218045419. The reversal of 218045412 is 214540812.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (218045419) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 76248 + ... + 79055.

It is an arithmetic number, because the mean of its divisors is an integer number (12683160).

Almost surely, 2^218045412 is an apocalyptic number.

It is an amenable number.

218045412 is an abundant number, since it is smaller than the sum of its proper divisors (390746268).

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

218045412 is a wasteful number, since it uses less digits than its factorization.

218045412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155329 (or 155321 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 27.

The square root of 218045412 is about 14766.3608245227. The cubic root of 218045412 is about 601.8879531572.

The spelling of 218045412 in words is "two hundred eighteen million, forty-five thousand, four hundred twelve".