164215444 has 12 divisors (see below), whose sum is σ = 304281684. Its totient is φ = 77277824.

The previous prime is 164215439. The next prime is 164215453. The reversal of 164215444 is 444512461.

164215444 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 101203600 + 63011844 = 10060^2 + 7938^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1207399 + ... + 1207534.

It is an arithmetic number, because the mean of its divisors is an integer number (25356807).

Almost surely, 2^164215444 is an apocalyptic number.

It is an amenable number.

164215444 is a deficient number, since it is larger than the sum of its proper divisors (140066240).

164215444 is a wasteful number, since it uses less digits than its factorization.

164215444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2414954 (or 2414952 counting only the distinct ones).

The product of its digits is 15360, while the sum is 31.

The square root of 164215444 is about 12814.6573890994. The cubic root of 164215444 is about 547.6099529661.

The spelling of 164215444 in words is "one hundred sixty-four million, two hundred fifteen thousand, four hundred forty-four".