265606213 has 8 divisors (see below), whose sum is σ = 267234968. Its totient is φ = 263983104.

The previous prime is 265606189. The next prime is 265606279. The reversal of 265606213 is 312606562.

It can be written as a sum of positive squares in 4 ways, for example, as 1803649 + 263802564 = 1343^2 + 16242^2 .

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 265606213 - 2⁹ = 265605701 is a prime.

It is a super-3 number, since 3×265606213³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (265606013) 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, 124645 + ... + 126757.

It is an arithmetic number, because the mean of its divisors is an integer number (33404371).

Almost surely, 2^265606213 is an apocalyptic number.

It is an amenable number.

265606213 is a deficient number, since it is larger than the sum of its proper divisors (1628755).

265606213 is a wasteful number, since it uses less digits than its factorization.

265606213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2823.

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 265606213 is about 16297.4296439653. The cubic root of 265606213 is about 642.8052422744.

The spelling of 265606213 in words is "two hundred sixty-five million, six hundred six thousand, two hundred thirteen".