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232238881 = 72193691
BaseRepresentation
bin11011101011110…
…10111100100001
3121011222221212001
431311322330201
5433423121011
635013404001
75516666200
oct1565727441
9534887761
10232238881
1110a102566
1265939601
1339164374
1422bb5237
15155c67c1
hexdd7af21

232238881 has 24 divisors (see below), whose sum is σ = 285574560. Its totient is φ = 188312040.

The previous prime is 232238869. The next prime is 232238959. The reversal of 232238881 is 188832232.

It is not a de Polignac number, because 232238881 - 27 = 232238753 is a prime.

It is a super-2 number, since 2×2322388812 = 107869795696264322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 232238881.

It is not an unprimeable number, because it can be changed into a prime (232238861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 335746 + ... + 336436.

It is an arithmetic number, because the mean of its divisors is an integer number (11898940).

Almost surely, 2232238881 is an apocalyptic number.

It is an amenable number.

232238881 is a deficient number, since it is larger than the sum of its proper divisors (53335679).

232238881 is an frugal number, since it uses more digits than its factorization.

232238881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 762 (or 717 counting only the distinct ones).

The product of its digits is 36864, while the sum is 37.

The square root of 232238881 is about 15239.3858472053. The cubic root of 232238881 is about 614.6741888051.

The spelling of 232238881 in words is "two hundred thirty-two million, two hundred thirty-eight thousand, eight hundred eighty-one".

Divisors: 1 7 19 49 133 361 691 931 2527 4837 6859 13129 17689 33859 48013 91903 249451 336091 643321 1746157 4739569 12223099 33176983 232238881