218061379 has 8 divisors (see below), whose sum is σ = 220220000. Its totient is φ = 215913600.

The previous prime is 218061359. The next prime is 218061407. The reversal of 218061379 is 973160812.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-218061379 is a prime.

It is a super-2 number, since 2×218061379² = 95101530022763282, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (218061359) 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 7 ways as a sum of consecutive naturals, for example, 41122 + ... + 46120.

It is an arithmetic number, because the mean of its divisors is an integer number (27527500).

Almost surely, 2^218061379 is an apocalyptic number.

218061379 is a deficient number, since it is larger than the sum of its proper divisors (2158621).

218061379 is a wasteful number, since it uses less digits than its factorization.

218061379 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5421.

The product of its (nonzero) digits is 18144, while the sum is 37.

The square root of 218061379 is about 14766.9014691641. The cubic root of 218061379 is about 601.9026444552.

The spelling of 218061379 in words is "two hundred eighteen million, sixty-one thousand, three hundred seventy-nine".