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1131132031 = 1913591287
BaseRepresentation
bin100001101101011…
…1011010001111111
32220211102110102221
41003122323101333
54304032211111
6304124030211
740013315011
oct10332732177
92824373387
101131132031
11530549267
12276992367
13150460cc3
14aa3241b1
1569485371
hex436bb47f

1131132031 has 4 divisors (see below), whose sum is σ = 1131725232. Its totient is φ = 1130538832.

The previous prime is 1131132029. The next prime is 1131132047. The reversal of 1131132031 is 1302311311.

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 1131132031 - 21 = 1131132029 is a prime.

It is a super-2 number, since 2×11311320312 = 2558919343108369922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1131131996 and 1131132014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131130031) 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, 293731 + ... + 297556.

It is an arithmetic number, because the mean of its divisors is an integer number (282931308).

Almost surely, 21131132031 is an apocalyptic number.

1131132031 is a deficient number, since it is larger than the sum of its proper divisors (593201).

1131132031 is an equidigital number, since it uses as much as digits as its factorization.

1131132031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 593200.

The product of its (nonzero) digits is 54, while the sum is 16.

The square root of 1131132031 is about 33632.3063586189. The cubic root of 1131132031 is about 1041.9281387292.

Adding to 1131132031 its reverse (1302311311), we get a palindrome (2433443342).

The spelling of 1131132031 in words is "one billion, one hundred thirty-one million, one hundred thirty-two thousand, thirty-one".

Divisors: 1 1913 591287 1131132031