206136451 has 8 divisors (see below), whose sum is σ = 212906880. Its totient is φ = 199472832.

The previous prime is 206136439. The next prime is 206136457. The reversal of 206136451 is 154631602.

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

It is a cyclic number.

It is not a de Polignac number, because 206136451 - 2¹⁵ = 206103683 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (206136457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22771 + ... + 30508.

It is an arithmetic number, because the mean of its divisors is an integer number (26613360).

Almost surely, 2^206136451 is an apocalyptic number.

206136451 is a deficient number, since it is larger than the sum of its proper divisors (6770429).

206136451 is an equidigital number, since it uses as much as digits as its factorization.

206136451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53405.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 206136451 is about 14357.4528033353. The cubic root of 206136451 is about 590.7244295003.

The spelling of 206136451 in words is "two hundred six million, one hundred thirty-six thousand, four hundred fifty-one".