208297157 has 4 divisors (see below), whose sum is σ = 208382880. Its totient is φ = 208211436.

The previous prime is 208297099. The next prime is 208297163. The reversal of 208297157 is 751792802.

208297157 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 208297157 - 2⁶ = 208297093 is a prime.

It is a super-2 number, since 2×208297157² = 86775411228565298, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (208297657) 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, 39107 + ... + 44112.

It is an arithmetic number, because the mean of its divisors is an integer number (52095720).

Almost surely, 2^208297157 is an apocalyptic number.

It is an amenable number.

208297157 is a deficient number, since it is larger than the sum of its proper divisors (85723).

208297157 is an equidigital number, since it uses as much as digits as its factorization.

208297157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85722.

The product of its (nonzero) digits is 70560, while the sum is 41.

The square root of 208297157 is about 14432.5034903859. The cubic root of 208297157 is about 592.7812353333.

The spelling of 208297157 in words is "two hundred eight million, two hundred ninety-seven thousand, one hundred fifty-seven".