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208060157 = 397524081
BaseRepresentation
bin11000110011010…
…11111011111101
3112111111112212202
430121223323331
5411230411112
632351241245
75104324244
oct1431537375
9474445782
10208060157
11a7498748
1259819225
1334149c26
141d8bd95b
15133ec6c2
hexc66befd

208060157 has 4 divisors (see below), whose sum is σ = 208584636. Its totient is φ = 207535680.

The previous prime is 208060141. The next prime is 208060183. The reversal of 208060157 is 751060802.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 751060802 = 2375530401.

It can be written as a sum of positive squares in 2 ways, for example, as 61795321 + 146264836 = 7861^2 + 12094^2 .

It is a cyclic number.

It is not a de Polignac number, because 208060157 - 24 = 208060141 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (208060057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 261644 + ... + 262437.

It is an arithmetic number, because the mean of its divisors is an integer number (52146159).

Almost surely, 2208060157 is an apocalyptic number.

It is an amenable number.

208060157 is a deficient number, since it is larger than the sum of its proper divisors (524479).

208060157 is an equidigital number, since it uses as much as digits as its factorization.

208060157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 524478.

The product of its (nonzero) digits is 3360, while the sum is 29.

The square root of 208060157 is about 14424.2905198141. The cubic root of 208060157 is about 592.5563283282.

The spelling of 208060157 in words is "two hundred eight million, sixty thousand, one hundred fifty-seven".

Divisors: 1 397 524081 208060157