212580251669 has 4 divisors (see below), whose sum is σ = 217523978496. Its totient is φ = 207636524844.

The previous prime is 212580251641. The next prime is 212580251707. The reversal of 212580251669 is 966152085212.

212580251669 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 212580251669 - 2¹² = 212580247573 is a prime.

It is a super-2 number, since 2×212580251669² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212580250669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2471863349 + ... + 2471863434.

It is an arithmetic number, because the mean of its divisors is an integer number (54380994624).

Almost surely, 2^212580251669 is an apocalyptic number.

It is an amenable number.

212580251669 is a deficient number, since it is larger than the sum of its proper divisors (4943726827).

212580251669 is an equidigital number, since it uses as much as digits as its factorization.

212580251669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4943726826.

The product of its (nonzero) digits is 518400, while the sum is 47.

The spelling of 212580251669 in words is "two hundred twelve billion, five hundred eighty million, two hundred fifty-one thousand, six hundred sixty-nine".