206624401 has 4 divisors (see below), whose sum is σ = 206968804. Its totient is φ = 206280000.

The previous prime is 206624381. The next prime is 206624419. The reversal of 206624401 is 104426602.

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 66438801 + 140185600 = 8151^2 + 11840^2 .

It is a cyclic number.

It is not a de Polignac number, because 206624401 - 2¹⁹ = 206100113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (206624471) 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, 171300 + ... + 172501.

It is an arithmetic number, because the mean of its divisors is an integer number (51742201).

Almost surely, 2^206624401 is an apocalyptic number.

It is an amenable number.

206624401 is a deficient number, since it is larger than the sum of its proper divisors (344403).

206624401 is an equidigital number, since it uses as much as digits as its factorization.

206624401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 344402.

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 206624401 is about 14374.4356758796. The cubic root of 206624401 is about 591.1901676824.

It can be divided in two parts, 206624 and 401, that added together give a square (207025 = 455²).

The spelling of 206624401 in words is "two hundred six million, six hundred twenty-four thousand, four hundred one".