212929965 has 28 divisors (see below), whose sum is σ = 383105244. Its totient is φ = 113560704.

The previous prime is 212929963. The next prime is 212929967. The reversal of 212929965 is 569929212.

212929965 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (212929963) and next prime (212929967).

It can be written as a sum of positive squares in 2 ways, for example, as 142420356 + 70509609 = 11934^2 + 8397^2 .

It is not a de Polignac number, because 212929965 - 2¹ = 212929963 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a zygodrome in base 3.

It is a self number, because there is not a number n which added to its sum of digits gives 212929965.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212929961) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 25564 + ... + 32853.

Almost surely, 2^212929965 is an apocalyptic number.

It is an amenable number.

212929965 is a deficient number, since it is larger than the sum of its proper divisors (170175279).

212929965 is an frugal number, since it uses more digits than its factorization.

212929965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58440 (or 58425 counting only the distinct ones).

The product of its digits is 174960, while the sum is 45.

The square root of 212929965 is about 14592.1199625003. The cubic root of 212929965 is about 597.1438001116.

The spelling of 212929965 in words is "two hundred twelve million, nine hundred twenty-nine thousand, nine hundred sixty-five".