164031331 has 4 divisors (see below), whose sum is σ = 171163152. Its totient is φ = 156899512.

The previous prime is 164031319. The next prime is 164031341. The reversal of 164031331 is 133130461.

It is a happy number.

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 164031331 - 2⁵ = 164031299 is a prime.

It is a super-2 number, since 2×164031331² = 53812555099263122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (164031341) 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, 3565876 + ... + 3565921.

It is an arithmetic number, because the mean of its divisors is an integer number (42790788).

Almost surely, 2^164031331 is an apocalyptic number.

164031331 is a deficient number, since it is larger than the sum of its proper divisors (7131821).

164031331 is an equidigital number, since it uses as much as digits as its factorization.

164031331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7131820.

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 164031331 is about 12807.4716864805. The cubic root of 164031331 is about 547.4052222949.

Adding to 164031331 its reverse (133130461), we get a palindrome (297161792).

The spelling of 164031331 in words is "one hundred sixty-four million, thirty-one thousand, three hundred thirty-one".