212773665 has 16 divisors (see below), whose sum is σ = 366625728. Its totient is φ = 104750016.

The previous prime is 212773657. The next prime is 212773669. The reversal of 212773665 is 566377212.

212773665 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 212773665 - 2³ = 212773657 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (212773669) 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, 545379 + ... + 545768.

It is an arithmetic number, because the mean of its divisors is an integer number (22914108).

Almost surely, 2^212773665 is an apocalyptic number.

It is an amenable number.

212773665 is a deficient number, since it is larger than the sum of its proper divisors (153852063).

212773665 is a wasteful number, since it uses less digits than its factorization.

212773665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1091168.

The product of its digits is 105840, while the sum is 39.

The square root of 212773665 is about 14586.7633490093. The cubic root of 212773665 is about 596.9976543710.

It can be divided in two parts, 21277 and 3665, that added together give a palindrome (24942).

The spelling of 212773665 in words is "two hundred twelve million, seven hundred seventy-three thousand, six hundred sixty-five".