164430251 has 4 divisors (see below), whose sum is σ = 164623872. Its totient is φ = 164236632.

The previous prime is 164430223. The next prime is 164430263. The reversal of 164430251 is 152034461.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 152034461 = 887 ⋅171403.

It is a cyclic number.

It is not a de Polignac number, because 164430251 - 2²⁶ = 97321387 is a prime.

It is a super-3 number, since 3×164430251³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 164430251.

It is not an unprimeable number, because it can be changed into a prime (164430281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 95531 + ... + 97236.

It is an arithmetic number, because the mean of its divisors is an integer number (41155968).

Almost surely, 2^164430251 is an apocalyptic number.

164430251 is a deficient number, since it is larger than the sum of its proper divisors (193621).

164430251 is an equidigital number, since it uses as much as digits as its factorization.

164430251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193620.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 164430251 is about 12823.0359509751. The cubic root of 164430251 is about 547.8486215418.

The spelling of 164430251 in words is "one hundred sixty-four million, four hundred thirty thousand, two hundred fifty-one".