164220812 has 24 divisors (see below), whose sum is σ = 332403456. Its totient is φ = 69531408.

The previous prime is 164220811. The next prime is 164220821. The reversal of 164220812 is 218022461.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (164220811) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33008 + ... + 37655.

It is an arithmetic number, because the mean of its divisors is an integer number (13850144).

Almost surely, 2^164220812 is an apocalyptic number.

It is an amenable number.

164220812 is an abundant number, since it is smaller than the sum of its proper divisors (168182644).

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

164220812 is a wasteful number, since it uses less digits than its factorization.

164220812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70757 (or 70755 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 26.

The square root of 164220812 is about 12814.8668350475. The cubic root of 164220812 is about 547.6159197987.

The spelling of 164220812 in words is "one hundred sixty-four million, two hundred twenty thousand, eight hundred twelve".