206235453251 has 16 divisors (see below), whose sum is σ = 221904458496. Its totient is φ = 191214662496.

The previous prime is 206235453197. The next prime is 206235453313. The reversal of 206235453251 is 152354532602.

It is a cyclic number.

It is not a de Polignac number, because 206235453251 - 2³⁰ = 205161711427 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (206235473251) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 918005 + ... + 1120358.

It is an arithmetic number, because the mean of its divisors is an integer number (13869028656).

Almost surely, 2^206235453251 is an apocalyptic number.

206235453251 is a deficient number, since it is larger than the sum of its proper divisors (15669005245).

206235453251 is a wasteful number, since it uses less digits than its factorization.

206235453251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2038522.

The product of its (nonzero) digits is 216000, while the sum is 38.

Adding to 206235453251 its reverse (152354532602), we get a palindrome (358589985853).

The spelling of 206235453251 in words is "two hundred six billion, two hundred thirty-five million, four hundred fifty-three thousand, two hundred fifty-one".