218149376 has 20 divisors (see below), whose sum is σ = 435873702. Its totient is φ = 109074432.

The previous prime is 218149369. The next prime is 218149381. The reversal of 218149376 is 673941812.

It can be written as a sum of positive squares in only one way, i.e., 180203776 + 37945600 = 13424^2 + 6160^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 212525 + ... + 213548.

Almost surely, 2^218149376 is an apocalyptic number.

It is an amenable number.

218149376 is a deficient number, since it is larger than the sum of its proper divisors (217724326).

218149376 is an frugal number, since it uses more digits than its factorization.

218149376 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 426091 (or 426075 counting only the distinct ones).

The product of its digits is 72576, while the sum is 41.

The square root of 218149376 is about 14769.8807036482. The cubic root of 218149376 is about 601.9835979681.

The spelling of 218149376 in words is "two hundred eighteen million, one hundred forty-nine thousand, three hundred seventy-six".