213706265 has 8 divisors (see below), whose sum is σ = 263378760. Its totient is φ = 166344192.

The previous prime is 213706253. The next prime is 213706267. The reversal of 213706265 is 562607312.

It can be written as a sum of positive squares in 4 ways, for example, as 39677401 + 174028864 = 6299^2 + 13192^2 .

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 213706265 - 2¹⁰ = 213705241 is a prime.

It is not an unprimeable number, because it can be changed into a prime (213706267) 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, 577400 + ... + 577769.

It is an arithmetic number, because the mean of its divisors is an integer number (32922345).

Almost surely, 2^213706265 is an apocalyptic number.

It is an amenable number.

213706265 is a deficient number, since it is larger than the sum of its proper divisors (49672495).

213706265 is a wasteful number, since it uses less digits than its factorization.

213706265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1155211.

The product of its (nonzero) digits is 15120, while the sum is 32.

The square root of 213706265 is about 14618.6957352563. The cubic root of 213706265 is about 597.8686088814.

The spelling of 213706265 in words is "two hundred thirteen million, seven hundred six thousand, two hundred sixty-five".