218861054 has 24 divisors (see below), whose sum is σ = 354309312. Its totient is φ = 101280960.

The previous prime is 218861051. The next prime is 218861087. The reversal of 218861054 is 450168812.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (218861051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 29462 + ... + 36134.

It is an arithmetic number, because the mean of its divisors is an integer number (14762888).

Almost surely, 2^218861054 is an apocalyptic number.

218861054 is a deficient number, since it is larger than the sum of its proper divisors (135448258).

218861054 is a wasteful number, since it uses less digits than its factorization.

218861054 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6752 (or 6729 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 35.

The square root of 218861054 is about 14793.9532918014. The cubic root of 218861054 is about 602.6375129610.

The spelling of 218861054 in words is "two hundred eighteen million, eight hundred sixty-one thousand, fifty-four".