164521400 has 24 divisors (see below), whose sum is σ = 382512720. Its totient is φ = 65808480.

The previous prime is 164521367. The next prime is 164521403. The reversal of 164521400 is 4125461.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164521403) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 411104 + ... + 411503.

It is an arithmetic number, because the mean of its divisors is an integer number (15938030).

Almost surely, 2^164521400 is an apocalyptic number.

164521400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

164521400 is an abundant number, since it is smaller than the sum of its proper divisors (217991320).

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

164521400 is a wasteful number, since it uses less digits than its factorization.

164521400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 822623 (or 822614 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 164521400 is about 12826.5895701079. The cubic root of 164521400 is about 547.9498329056.

Adding to 164521400 its reverse (4125461), we get a palindrome (168646861).

The spelling of 164521400 in words is "one hundred sixty-four million, five hundred twenty-one thousand, four hundred".