212664041 has 4 divisors (see below), whose sum is σ = 212709252. Its totient is φ = 212618832.

The previous prime is 212664031. The next prime is 212664043. The reversal of 212664041 is 140466212.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 141514816 + 71149225 = 11896^2 + 8435^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212664041 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 212664041.

It is not an unprimeable number, because it can be changed into a prime (212664043) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14606 + ... + 25271.

It is an arithmetic number, because the mean of its divisors is an integer number (53177313).

Almost surely, 2^212664041 is an apocalyptic number.

It is an amenable number.

212664041 is a deficient number, since it is larger than the sum of its proper divisors (45211).

212664041 is an equidigital number, since it uses as much as digits as its factorization.

212664041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45210.

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 212664041 is about 14583.0052115468. The cubic root of 212664041 is about 596.8951095479.

The spelling of 212664041 in words is "two hundred twelve million, six hundred sixty-four thousand, forty-one".