213620265 has 24 divisors (see below), whose sum is σ = 375353160. Its totient is φ = 112368384.

The previous prime is 213620261. The next prime is 213620371. The reversal of 213620265 is 562026312.

213620265 is a `hidden beast` number, since 2 + 13 + 620 + 26 + 5 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 97239321 + 116380944 = 9861^2 + 10788^2 .

It is not a de Polignac number, because 213620265 - 2² = 213620261 is a prime.

It is not an unprimeable number, because it can be changed into a prime (213620261) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 29230 + ... + 35799.

It is an arithmetic number, because the mean of its divisors is an integer number (15639715).

Almost surely, 2^213620265 is an apocalyptic number.

It is an amenable number.

213620265 is a deficient number, since it is larger than the sum of its proper divisors (161732895).

213620265 is a wasteful number, since it uses less digits than its factorization.

213620265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65113 (or 65110 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 213620265 is about 14615.7540003929. The cubic root of 213620265 is about 597.7883997231.

Adding to 213620265 its reverse (562026312), we get a palindrome (775646577).

The spelling of 213620265 in words is "two hundred thirteen million, six hundred twenty thousand, two hundred sixty-five".