164228505 has 16 divisors (see below), whose sum is σ = 300303744. Its totient is φ = 75075840.

The previous prime is 164228501. The next prime is 164228513. The reversal of 164228505 is 505822461.

It is not a de Polignac number, because 164228505 - 2² = 164228501 is a prime.

It is not an unprimeable number, because it can be changed into a prime (164228501) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 781936 + ... + 782145.

It is an arithmetic number, because the mean of its divisors is an integer number (18768984).

Almost surely, 2^164228505 is an apocalyptic number.

164228505 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

164228505 is a deficient number, since it is larger than the sum of its proper divisors (136075239).

164228505 is a wasteful number, since it uses less digits than its factorization.

164228505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1564096.

The product of its (nonzero) digits is 19200, while the sum is 33.

The square root of 164228505 is about 12815.1669907185. The cubic root of 164228505 is about 547.6244707724.

The spelling of 164228505 in words is "one hundred sixty-four million, two hundred twenty-eight thousand, five hundred five".