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1223232131 = 113117092099
BaseRepresentation
bin100100011101001…
…0000101010000011
310011020201122000202
41020322100222003
510001121412011
6321214035415
742212205302
oct11072205203
93136648022
101223232131
11578534450
122a17a8b6b
13166569ac4
14b865a439
15725c923b
hex48e90a83

1223232131 has 16 divisors (see below), whose sum is σ = 1378944000. Its totient is φ = 1075015200.

The previous prime is 1223232097. The next prime is 1223232139. The reversal of 1223232131 is 1312323221.

It is a cyclic number.

It is not a de Polignac number, because 1223232131 - 26 = 1223232067 is a prime.

It is a super-2 number, since 2×12232321312 = 2992593692621602322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1223232139) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 581720 + ... + 583818.

It is an arithmetic number, because the mean of its divisors is an integer number (86184000).

Almost surely, 21223232131 is an apocalyptic number.

1223232131 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1223232131 is a deficient number, since it is larger than the sum of its proper divisors (155711869).

1223232131 is a wasteful number, since it uses less digits than its factorization.

1223232131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3850.

The product of its digits is 432, while the sum is 20.

The square root of 1223232131 is about 34974.7356101515. The cubic root of 1223232131 is about 1069.4725122968.

Adding to 1223232131 its reverse (1312323221), we get a palindrome (2535555352).

The spelling of 1223232131 in words is "one billion, two hundred twenty-three million, two hundred thirty-two thousand, one hundred thirty-one".

Divisors: 1 11 31 341 1709 2099 18799 23089 52979 65069 582769 715759 3587191 39459101 111202921 1223232131