213117965 has 16 divisors (see below), whose sum is σ = 276481920. Its totient is φ = 157152960.

The previous prime is 213117941. The next prime is 213118007. The reversal of 213117965 is 569711312.

It is not a de Polignac number, because 213117965 - 2¹⁸ = 212855821 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26801 + ... + 33830.

It is an arithmetic number, because the mean of its divisors is an integer number (17280120).

Almost surely, 2^213117965 is an apocalyptic number.

It is an amenable number.

213117965 is a deficient number, since it is larger than the sum of its proper divisors (63363955).

213117965 is a wasteful number, since it uses less digits than its factorization.

213117965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60692.

The product of its digits is 11340, while the sum is 35.

The square root of 213117965 is about 14598.5603742287. The cubic root of 213117965 is about 597.3194916993.

The spelling of 213117965 in words is "two hundred thirteen million, one hundred seventeen thousand, nine hundred sixty-five".