218161934 has 8 divisors (see below), whose sum is σ = 327384288. Its totient is φ = 109033840.

The previous prime is 218161907. The next prime is 218161949. The reversal of 218161934 is 439161812.

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

It is a junction number, because it is equal to n+sod(n) for n = 218161894 and 218161903.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17462 + ... + 27225.

It is an arithmetic number, because the mean of its divisors is an integer number (40923036).

Almost surely, 2^218161934 is an apocalyptic number.

218161934 is a deficient number, since it is larger than the sum of its proper divisors (109222354).

218161934 is a wasteful number, since it uses less digits than its factorization.

218161934 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47130.

The product of its digits is 10368, while the sum is 35.

The square root of 218161934 is about 14770.3058194473. The cubic root of 218161934 is about 601.9951490211.

The spelling of 218161934 in words is "two hundred eighteen million, one hundred sixty-one thousand, nine hundred thirty-four".