218461451 has 8 divisors (see below), whose sum is σ = 235740960. Its totient is φ = 201249792.

The previous prime is 218461427. The next prime is 218461511. The reversal of 218461451 is 154164812.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 218461451 - 2⁶ = 218461387 is a prime.

It is not an unprimeable number, because it can be changed into a prime (218461421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10166 + ... + 23243.

It is an arithmetic number, because the mean of its divisors is an integer number (29467620).

Almost surely, 2^218461451 is an apocalyptic number.

218461451 is a deficient number, since it is larger than the sum of its proper divisors (17279509).

218461451 is a wasteful number, since it uses less digits than its factorization.

218461451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33925.

The product of its digits is 7680, while the sum is 32.

The square root of 218461451 is about 14780.4415022015. The cubic root of 218461451 is about 602.2705183688.

The spelling of 218461451 in words is "two hundred eighteen million, four hundred sixty-one thousand, four hundred fifty-one".