212501065 has 16 divisors (see below), whose sum is σ = 292286592. Its totient is φ = 145286784.

The previous prime is 212501041. The next prime is 212501077. The reversal of 212501065 is 560105212.

It is a cyclic number.

It is not a de Polignac number, because 212501065 - 2⁵ = 212501033 is a prime.

It is a super-2 number, since 2×212501065² = 90313405252268450, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3397 + ... + 20893.

It is an arithmetic number, because the mean of its divisors is an integer number (18267912).

Almost surely, 2^212501065 is an apocalyptic number.

It is an amenable number.

212501065 is a deficient number, since it is larger than the sum of its proper divisors (79785527).

212501065 is a wasteful number, since it uses less digits than its factorization.

212501065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17856.

The product of its (nonzero) digits is 600, while the sum is 22.

The square root of 212501065 is about 14577.4162662661. The cubic root of 212501065 is about 596.7425928715.

Adding to 212501065 its reverse (560105212), we get a palindrome (772606277).

The spelling of 212501065 in words is "two hundred twelve million, five hundred one thousand, sixty-five".