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123231132 = 2235126781
BaseRepresentation
bin1110101100001…
…01101110011100
322120212210100000
413112011232130
5223021344012
620121134300
73024306303
oct726055634
9276783300
10123231132
1163619412
123532a390
131c6b883b
141251b43a
15ac42ddc
hex7585b9c

123231132 has 36 divisors (see below), whose sum is σ = 323040536. Its totient is φ = 41076720.

The previous prime is 123231109. The next prime is 123231161. The reversal of 123231132 is 231132321.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 62419 + ... + 64362.

Almost surely, 2123231132 is an apocalyptic number.

123231132 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

123231132 is an abundant number, since it is smaller than the sum of its proper divisors (199809404).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

123231132 is a wasteful number, since it uses less digits than its factorization.

123231132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126800 (or 126786 counting only the distinct ones).

The product of its digits is 216, while the sum is 18.

The square root of 123231132 is about 11100.9518510802. The cubic root of 123231132 is about 497.6302960828.

Adding to 123231132 its reverse (231132321), we get a palindrome (354363453).

The spelling of 123231132 in words is "one hundred twenty-three million, two hundred thirty-one thousand, one hundred thirty-two".

Divisors: 1 2 3 4 6 9 12 18 27 36 54 81 108 162 243 324 486 972 126781 253562 380343 507124 760686 1141029 1521372 2282058 3423087 4564116 6846174 10269261 13692348 20538522 30807783 41077044 61615566 123231132