164212190 has 16 divisors (see below), whose sum is σ = 295749792. Its totient is φ = 65647584.

The previous prime is 164212187. The next prime is 164212201. The reversal of 164212190 is 91212461.

It is a super-2 number, since 2×164212190² = 53931286689192200, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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, 20087 + ... + 27053.

It is an arithmetic number, because the mean of its divisors is an integer number (18484362).

Almost surely, 2^164212190 is an apocalyptic number.

164212190 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

164212190 is a deficient number, since it is larger than the sum of its proper divisors (131537602).

164212190 is a wasteful number, since it uses less digits than its factorization.

164212190 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9331.

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 164212190 is about 12814.5304244830. The cubic root of 164212190 is about 547.6063358996.

The spelling of 164212190 in words is "one hundred sixty-four million, two hundred twelve thousand, one hundred ninety".