206225243136421 has 16 divisors (see below), whose sum is σ = 209960377675776. Its totient is φ = 202501558800000.

The previous prime is 206225243136383. The next prime is 206225243136439. The reversal of 206225243136421 is 124631342522602.

It is a cyclic number.

It is not a de Polignac number, because 206225243136421 - 2⁷ = 206225243136293 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206225243136491) 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, 2470579716 + ... + 2470663186.

It is an arithmetic number, because the mean of its divisors is an integer number (13122523604736).

Almost surely, 2^{206225243136421} is an apocalyptic number.

It is an amenable number.

206225243136421 is a deficient number, since it is larger than the sum of its proper divisors (3735134539355).

206225243136421 is an equidigital number, since it uses as much as digits as its factorization.

206225243136421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151524.

The product of its (nonzero) digits is 829440, while the sum is 43.

The spelling of 206225243136421 in words is "two hundred six trillion, two hundred twenty-five billion, two hundred forty-three million, one hundred thirty-six thousand, four hundred twenty-one".