206450643 has 32 divisors (see below), whose sum is σ = 321555456. Its totient is φ = 115388928.

The previous prime is 206450609. The next prime is 206450653. The reversal of 206450643 is 346054602.

It is not a de Polignac number, because 206450643 - 2⁶ = 206450579 is a prime.

It is a super-2 number, since 2×206450643² = 85243735990226898, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 206450643.

It is not an unprimeable number, because it can be changed into a prime (206450603) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 209530 + ... + 210512.

It is an arithmetic number, because the mean of its divisors is an integer number (10048608).

Almost surely, 2^206450643 is an apocalyptic number.

206450643 is a deficient number, since it is larger than the sum of its proper divisors (115104813).

206450643 is a wasteful number, since it uses less digits than its factorization.

206450643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1203.

The product of its (nonzero) digits is 17280, while the sum is 30.

The square root of 206450643 is about 14368.3904108985. The cubic root of 206450643 is about 591.0244034117.

The spelling of 206450643 in words is "two hundred six million, four hundred fifty thousand, six hundred forty-three".