164211265 has 4 divisors (see below), whose sum is σ = 197053524. Its totient is φ = 131369008.

The previous prime is 164211221. The next prime is 164211277. The reversal of 164211265 is 562112461.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 562112461 = 863 ⋅651347.

It can be written as a sum of positive squares in 2 ways, for example, as 74511424 + 89699841 = 8632^2 + 9471^2 .

It is a cyclic number.

It is not a de Polignac number, because 164211265 - 2¹⁷ = 164080193 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16421122 + ... + 16421131.

It is an arithmetic number, because the mean of its divisors is an integer number (49263381).

Almost surely, 2^164211265 is an apocalyptic number.

It is an amenable number.

164211265 is a deficient number, since it is larger than the sum of its proper divisors (32842259).

164211265 is an equidigital number, since it uses as much as digits as its factorization.

164211265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32842258.

The product of its digits is 2880, while the sum is 28.

The square root of 164211265 is about 12814.4943325907. The cubic root of 164211265 is about 547.6053076836.

The spelling of 164211265 in words is "one hundred sixty-four million, two hundred eleven thousand, two hundred sixty-five".