164042220 has 48 divisors (see below), whose sum is σ = 469099008. Its totient is φ = 42813120.

The previous prime is 164042167. The next prime is 164042239. The reversal of 164042220 is 22240461.

164042220 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26266 + ... + 31905.

It is an arithmetic number, because the mean of its divisors is an integer number (9772896).

Almost surely, 2^164042220 is an apocalyptic number.

164042220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

164042220 is an abundant number, since it is smaller than the sum of its proper divisors (305056788).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

164042220 is a wasteful number, since it uses less digits than its factorization.

164042220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58230 (or 58228 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 164042220 is about 12807.8967828446. The cubic root of 164042220 is about 547.4173349474.

Adding to 164042220 its reverse (22240461), we get a palindrome (186282681).

The spelling of 164042220 in words is "one hundred sixty-four million, forty-two thousand, two hundred twenty".