206131551299 has 4 divisors (see below), whose sum is σ = 209510757120. Its totient is φ = 202752345480.

The previous prime is 206131551233. The next prime is 206131551319. The reversal of 206131551299 is 992155131602.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-206131551299 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (206131551499) 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, 1689602819 + ... + 1689602940.

It is an arithmetic number, because the mean of its divisors is an integer number (52377689280).

Almost surely, 2^206131551299 is an apocalyptic number.

206131551299 is a deficient number, since it is larger than the sum of its proper divisors (3379205821).

206131551299 is an equidigital number, since it uses as much as digits as its factorization.

206131551299 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3379205820.

The product of its (nonzero) digits is 145800, while the sum is 44.

The spelling of 206131551299 in words is "two hundred six billion, one hundred thirty-one million, five hundred fifty-one thousand, two hundred ninety-nine".