164240331 has 4 divisors (see below), whose sum is σ = 218987112. Its totient is φ = 109493552.

The previous prime is 164240287. The next prime is 164240347. The reversal of 164240331 is 133042461.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 133042461 = 3 ⋅44347487.

It is a cyclic number.

It is not a de Polignac number, because 164240331 - 2⁷ = 164240203 is a prime.

It is a super-2 number, since 2×164240331² = 53949772653979122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (164240431) 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, 27373386 + ... + 27373391.

It is an arithmetic number, because the mean of its divisors is an integer number (54746778).

Almost surely, 2^164240331 is an apocalyptic number.

164240331 is a deficient number, since it is larger than the sum of its proper divisors (54746781).

164240331 is an equidigital number, since it uses as much as digits as its factorization.

164240331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54746780.

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 164240331 is about 12815.6283888072. The cubic root of 164240331 is about 547.6376151644.

Adding to 164240331 its reverse (133042461), we get a palindrome (297282792).

The spelling of 164240331 in words is "one hundred sixty-four million, two hundred forty thousand, three hundred thirty-one".