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75131 = 710733
BaseRepresentation
bin10010010101111011
310211001122
4102111323
54401011
61335455
7432020
oct222573
9124048
1075131
11514a1
123758b
1328274
141d547
15173db
hex1257b

75131 has 4 divisors (see below), whose sum is σ = 85872. Its totient is φ = 64392.

The previous prime is 75109. The next prime is 75133. The reversal of 75131 is 13157.

Adding to 75131 its reverse (13157), we get a palindrome (88288).

75131 = T143 + T144 + ... + T149.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13157 = 59223.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-75131 is a prime.

It is a super-2 number, since 2×751312 = 11289334322, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (75133) 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, 5360 + ... + 5373.

It is an arithmetic number, because the mean of its divisors is an integer number (21468).

275131 is an apocalyptic number.

75131 is a deficient number, since it is larger than the sum of its proper divisors (10741).

75131 is a wasteful number, since it uses less digits than its factorization.

75131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10740.

The product of its digits is 105, while the sum is 17.

The square root of 75131 is about 274.1003465886. The cubic root of 75131 is about 42.1961722455.

The spelling of 75131 in words is "seventy-five thousand, one hundred thirty-one".

Divisors: 1 7 10733 75131