208700051 has 8 divisors (see below), whose sum is σ = 242557440. Its totient is φ = 175853448.

The previous prime is 208700033. The next prime is 208700053. The reversal of 208700051 is 150007802.

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 208700051 - 2⁶ = 208699987 is a prime.

It is a super-2 number, since 2×208700051² = 87111422574805202, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (208700053) 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, 252251 + ... + 253076.

It is an arithmetic number, because the mean of its divisors is an integer number (30319680).

Almost surely, 2^208700051 is an apocalyptic number.

208700051 is a deficient number, since it is larger than the sum of its proper divisors (33857389).

208700051 is an equidigital number, since it uses as much as digits as its factorization.

208700051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 505393.

The product of its (nonzero) digits is 560, while the sum is 23.

The square root of 208700051 is about 14446.4546169640. The cubic root of 208700051 is about 593.1631803538.

Adding to 208700051 its reverse (150007802), we get a palindrome (358707853).

The spelling of 208700051 in words is "two hundred eight million, seven hundred thousand, fifty-one".