264221705 has 16 divisors (see below), whose sum is σ = 346742208. Its totient is φ = 191688000.

The previous prime is 264221663. The next prime is 264221729. The reversal of 264221705 is 507122462.

264221705 = T₁₀₂₇₈ + T₁₀₂₇₉ + ... + T₁₀₂₈₂.

It is a happy number.

It is not a de Polignac number, because 264221705 - 2⁶ = 264221641 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 17450 + ... + 28860.

It is an arithmetic number, because the mean of its divisors is an integer number (21671388).

Almost surely, 2^264221705 is an apocalyptic number.

It is an amenable number.

264221705 is a deficient number, since it is larger than the sum of its proper divisors (82520503).

264221705 is a wasteful number, since it uses less digits than its factorization.

264221705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11848.

The product of its (nonzero) digits is 6720, while the sum is 29.

The square root of 264221705 is about 16254.8978772553. The cubic root of 264221705 is about 641.6863931268.

The spelling of 264221705 in words is "two hundred sixty-four million, two hundred twenty-one thousand, seven hundred five".