164831213 has 4 divisors (see below), whose sum is σ = 173506560. Its totient is φ = 156155868.

The previous prime is 164831207. The next prime is 164831231. The reversal of 164831213 is 312138461.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 164831213 - 2¹⁰ = 164830189 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 (164831203) 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, 4337645 + ... + 4337682.

It is an arithmetic number, because the mean of its divisors is an integer number (43376640).

Almost surely, 2^164831213 is an apocalyptic number.

It is an amenable number.

164831213 is a deficient number, since it is larger than the sum of its proper divisors (8675347).

164831213 is an equidigital number, since it uses as much as digits as its factorization.

164831213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8675346.

The product of its digits is 3456, while the sum is 29.

The square root of 164831213 is about 12838.6608725365. The cubic root of 164831213 is about 548.2935683961.

Adding to 164831213 its reverse (312138461), we get a palindrome (476969674).

The spelling of 164831213 in words is "one hundred sixty-four million, eight hundred thirty-one thousand, two hundred thirteen".