213259965 has 16 divisors (see below), whose sum is σ = 346811136. Its totient is φ = 111873600.

The previous prime is 213259961. The next prime is 213259967. The reversal of 213259965 is 569952312.

It is not a de Polignac number, because 213259965 - 2² = 213259961 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213259961) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 115621 + ... + 117450.

It is an arithmetic number, because the mean of its divisors is an integer number (21675696).

Almost surely, 2^213259965 is an apocalyptic number.

It is an amenable number.

213259965 is a deficient number, since it is larger than the sum of its proper divisors (133551171).

213259965 is a wasteful number, since it uses less digits than its factorization.

213259965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233140.

The product of its digits is 145800, while the sum is 42.

The square root of 213259965 is about 14603.4230576259. The cubic root of 213259965 is about 597.4521264375.

The spelling of 213259965 in words is "two hundred thirteen million, two hundred fifty-nine thousand, nine hundred sixty-five".