164243451 has 4 divisors (see below), whose sum is σ = 218991272. Its totient is φ = 109495632.

The previous prime is 164243423. The next prime is 164243459. The reversal of 164243451 is 154342461.

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

It is not a de Polignac number, because 164243451 - 2⁷ = 164243323 is a prime.

It is a super-2 number, since 2×164243451² = 53951822392778802, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (164243459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27373906 + ... + 27373911.

It is an arithmetic number, because the mean of its divisors is an integer number (54747818).

Almost surely, 2^164243451 is an apocalyptic number.

164243451 is a deficient number, since it is larger than the sum of its proper divisors (54747821).

164243451 is an equidigital number, since it uses as much as digits as its factorization.

164243451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54747820.

The product of its digits is 11520, while the sum is 30.

The square root of 164243451 is about 12815.7501146051. The cubic root of 164243451 is about 547.6410828846.

The spelling of 164243451 in words is "one hundred sixty-four million, two hundred forty-three thousand, four hundred fifty-one".