164262261 has 4 divisors (see below), whose sum is σ = 219016352. Its totient is φ = 109508172.

The previous prime is 164262257. The next prime is 164262269. The reversal of 164262261 is 162262461.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 164262261 - 2² = 164262257 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 (164262269) 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, 27377041 + ... + 27377046.

It is an arithmetic number, because the mean of its divisors is an integer number (54754088).

Almost surely, 2^164262261 is an apocalyptic number.

It is an amenable number.

164262261 is a deficient number, since it is larger than the sum of its proper divisors (54754091).

164262261 is an equidigital number, since it uses as much as digits as its factorization.

164262261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54754090.

The product of its digits is 6912, while the sum is 30.

The square root of 164262261 is about 12816.4839562183. The cubic root of 164262261 is about 547.6619883057.

It can be divided in two parts, 1642 and 62261, that added together give a triangular number (63903 = T₃₅₇).

The spelling of 164262261 in words is "one hundred sixty-four million, two hundred sixty-two thousand, two hundred sixty-one".