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138211 = 413371
BaseRepresentation
bin100001101111100011
321000120221
4201233203
513410321
62543511
71113643
oct415743
9230527
10138211
1194927
1267b97
134aba8
1438523
152ae41
hex21be3

138211 has 4 divisors (see below), whose sum is σ = 141624. Its totient is φ = 134800.

The previous prime is 138209. The next prime is 138239. The reversal of 138211 is 112831.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 138211 - 21 = 138209 is a prime.

It is a Duffinian number.

138211 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (138241) 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, 1645 + ... + 1726.

It is an arithmetic number, because the mean of its divisors is an integer number (35406).

2138211 is an apocalyptic number.

138211 is a deficient number, since it is larger than the sum of its proper divisors (3413).

138211 is an equidigital number, since it uses as much as digits as its factorization.

138211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3412.

The product of its digits is 48, while the sum is 16.

The square root of 138211 is about 371.7674003998. The cubic root of 138211 is about 51.7028166478.

The spelling of 138211 in words is "one hundred thirty-eight thousand, two hundred eleven".

Divisors: 1 41 3371 138211