164231111 has 4 divisors (see below), whose sum is σ = 179161224. Its totient is φ = 149301000.

The previous prime is 164231107. The next prime is 164231143. The reversal of 164231111 is 111132461.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 111132461 = 11 ⋅10102951.

It is a cyclic number.

It is not a de Polignac number, because 164231111 - 2² = 164231107 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164231311) 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, 7465040 + ... + 7465061.

It is an arithmetic number, because the mean of its divisors is an integer number (44790306).

Almost surely, 2^164231111 is an apocalyptic number.

164231111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

164231111 is a deficient number, since it is larger than the sum of its proper divisors (14930113).

164231111 is a wasteful number, since it uses less digits than its factorization.

164231111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14930112.

The product of its digits is 144, while the sum is 20.

The square root of 164231111 is about 12815.2686667116. The cubic root of 164231111 is about 547.6273673499.

Adding to 164231111 its reverse (111132461), we get a palindrome (275363572).

The spelling of 164231111 in words is "one hundred sixty-four million, two hundred thirty-one thousand, one hundred eleven".