164263261 has 8 divisors (see below), whose sum is σ = 171851904. Its totient is φ = 156845280.

The previous prime is 164263223. The next prime is 164263373. The reversal of 164263261 is 162362461.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 164263261 - 2¹⁹ = 163738973 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164263661) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40695 + ... + 44548.

It is an arithmetic number, because the mean of its divisors is an integer number (21481488).

Almost surely, 2^164263261 is an apocalyptic number.

It is an amenable number.

164263261 is a deficient number, since it is larger than the sum of its proper divisors (7588643).

164263261 is an equidigital number, since it uses as much as digits as its factorization.

164263261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85331.

The product of its digits is 10368, while the sum is 31.

The square root of 164263261 is about 12816.5229684185. The cubic root of 164263261 is about 547.6630996604.

The spelling of 164263261 in words is "one hundred sixty-four million, two hundred sixty-three thousand, two hundred sixty-one".