218085254 has 16 divisors (see below), whose sum is σ = 331184592. Its totient is φ = 107697408.

The previous prime is 218085253. The next prime is 218085281. The reversal of 218085254 is 452580812.

It is a happy number.

It is a super-2 number, since 2×218085254² = 95122356024489032, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (218085253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69197 + ... + 72279.

It is an arithmetic number, because the mean of its divisors is an integer number (20699037).

Almost surely, 2^218085254 is an apocalyptic number.

218085254 is a deficient number, since it is larger than the sum of its proper divisors (113099338).

218085254 is a wasteful number, since it uses less digits than its factorization.

218085254 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3511.

The product of its (nonzero) digits is 25600, while the sum is 35.

The square root of 218085254 is about 14767.7098427617. The cubic root of 218085254 is about 601.9246105966.

The spelling of 218085254 in words is "two hundred eighteen million, eighty-five thousand, two hundred fifty-four".