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113531 = 1110321
BaseRepresentation
bin11011101101111011
312202201212
4123231323
512113111
62233335
7651665
oct335573
9182655
10113531
1178330
125584b
133c8a2
142d535
152398b
hex1bb7b

113531 has 4 divisors (see below), whose sum is σ = 123864. Its totient is φ = 103200.

The previous prime is 113513. The next prime is 113537. The reversal of 113531 is 135311.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 135311 = 1112301.

It is a cyclic number.

It is not a de Polignac number, because 113531 - 26 = 113467 is a prime.

It is a super-2 number, since 2×1135312 = 25778575922, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 6.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5150 + ... + 5171.

It is an arithmetic number, because the mean of its divisors is an integer number (30966).

2113531 is an apocalyptic number.

113531 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

113531 is a deficient number, since it is larger than the sum of its proper divisors (10333).

113531 is a wasteful number, since it uses less digits than its factorization.

113531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10332.

The product of its digits is 45, while the sum is 14.

The square root of 113531 is about 336.9436154611. The cubic root of 113531 is about 48.4214905816.

Adding to 113531 its reverse (135311), we get a palindrome (248842).

The spelling of 113531 in words is "one hundred thirteen thousand, five hundred thirty-one".

Divisors: 1 11 10321 113531