164212247 has 4 divisors (see below), whose sum is σ = 164262456. Its totient is φ = 164162040.

The previous prime is 164212241. The next prime is 164212283. The reversal of 164212247 is 742212461.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 164212247 - 2¹⁶ = 164146711 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164212241) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19829 + ... + 26862.

It is an arithmetic number, because the mean of its divisors is an integer number (41065614).

Almost surely, 2^164212247 is an apocalyptic number.

164212247 is a deficient number, since it is larger than the sum of its proper divisors (50209).

164212247 is an equidigital number, since it uses as much as digits as its factorization.

164212247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50208.

The product of its digits is 5376, while the sum is 29.

The square root of 164212247 is about 12814.5326485206. The cubic root of 164212247 is about 547.6063992598.

The spelling of 164212247 in words is "one hundred sixty-four million, two hundred twelve thousand, two hundred forty-seven".