208831051745 has 8 divisors (see below), whose sum is σ = 251452544616. Its totient is φ = 166494653056.

The previous prime is 208831051739. The next prime is 208831051769. The reversal of 208831051745 is 547150138802.

It can be written as a sum of positive squares in 4 ways, for example, as 116720622736 + 92110429009 = 341644^2 + 303497^2 .

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 208831051745 - 2²⁰ = 208830003169 is a prime.

It is a super-2 number, since 2×208831051745² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 208831051696 and 208831051705.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71271932 + ... + 71274861.

It is an arithmetic number, because the mean of its divisors is an integer number (31431568077).

Almost surely, 2^208831051745 is an apocalyptic number.

It is an amenable number.

208831051745 is a deficient number, since it is larger than the sum of its proper divisors (42621492871).

208831051745 is a wasteful number, since it uses less digits than its factorization.

208831051745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142547091.

The product of its (nonzero) digits is 268800, while the sum is 44.

The spelling of 208831051745 in words is "two hundred eight billion, eight hundred thirty-one million, fifty-one thousand, seven hundred forty-five".