206653431 has 8 divisors (see below), whose sum is σ = 276774400. Its totient is φ = 137150712.

The previous prime is 206653429. The next prime is 206653439. The reversal of 206653431 is 134356602.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 206653431 - 2¹ = 206653429 is a prime.

It is a super-2 number, since 2×206653431² = 85411281088143522, which 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 (206653439) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 153781 + ... + 155118.

It is an arithmetic number, because the mean of its divisors is an integer number (34596800).

Almost surely, 2^206653431 is an apocalyptic number.

206653431 is a deficient number, since it is larger than the sum of its proper divisors (70120969).

206653431 is a wasteful number, since it uses less digits than its factorization.

206653431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 309125.

The product of its (nonzero) digits is 12960, while the sum is 30.

The square root of 206653431 is about 14375.4454191861. The cubic root of 206653431 is about 591.2178530974.

The spelling of 206653431 in words is "two hundred six million, six hundred fifty-three thousand, four hundred thirty-one".