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3151 = 23137
BaseRepresentation
bin110001001111
311022201
4301033
5100101
622331
712121
oct6117
94281
103151
112405
1219a7
131585
141211
15e01
hexc4f

3151 has 4 divisors (see below), whose sum is σ = 3312. Its totient is φ = 2992.

The previous prime is 3137. The next prime is 3163. The reversal of 3151 is 1513.

3151 is nontrivially palindromic in base 7.

3151 is an esthetic number in base 7, because in such base its adjacent digits differ by 1.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1513 = 1789.

It is a cyclic number.

It is not a de Polignac number, because 3151 - 25 = 3119 is a prime.

3151 is an undulating number in base 7.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46 + ... + 91.

It is an arithmetic number, because the mean of its divisors is an integer number (828).

3151 is the 46-th pentagonal number.

3151 is the 36-th centered pentagonal number.

3151 is a deficient number, since it is larger than the sum of its proper divisors (161).

3151 is a wasteful number, since it uses less digits than its factorization.

3151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160.

The product of its digits is 15, while the sum is 10.

The square root of 3151 is about 56.1337688027. The cubic root of 3151 is about 14.6605231386.

Subtracting from 3151 its product of digits (15), we obtain a square (3136 = 562).

Adding to 3151 its reverse (1513), we get a palindrome (4664).

The spelling of 3151 in words is "three thousand, one hundred fifty-one".

Divisors: 1 23 137 3151