208144457 has 8 divisors (see below), whose sum is σ = 217339584. Its totient is φ = 198961488.

The previous prime is 208144451. The next prime is 208144463. The reversal of 208144457 is 754441802.

It is an interprime number because it is at equal distance from previous prime (208144451) and next prime (208144463).

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 208144457 - 2⁶ = 208144393 is a prime.

It is a super-2 number, since 2×208144457² = 86648229959649698, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (208144451) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60023 + ... + 63395.

It is an arithmetic number, because the mean of its divisors is an integer number (27167448).

Almost surely, 2^208144457 is an apocalyptic number.

It is an amenable number.

208144457 is a deficient number, since it is larger than the sum of its proper divisors (9195127).

208144457 is a wasteful number, since it uses less digits than its factorization.

208144457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6079.

The product of its (nonzero) digits is 35840, while the sum is 35.

The square root of 208144457 is about 14427.2123780029. The cubic root of 208144457 is about 592.6363464574.

The spelling of 208144457 in words is "two hundred eight million, one hundred forty-four thousand, four hundred fifty-seven".