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231061204 = 221119276389
BaseRepresentation
bin11011100010110…
…11011011010100
3121002210010101101
431301123123110
5433122424304
634532235444
75503662553
oct1561333324
9532703341
10231061204
11109478780
126546bb84
1338b4130a
1422989d9a
15154428a4
hexdc5b6d4

231061204 has 24 divisors (see below), whose sum is σ = 464335200. Its totient is φ = 99499680.

The previous prime is 231061141. The next prime is 231061211. The reversal of 231061204 is 402160132.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 137359 + ... + 139030.

It is an arithmetic number, because the mean of its divisors is an integer number (19347300).

Almost surely, 2231061204 is an apocalyptic number.

It is an amenable number.

231061204 is an abundant number, since it is smaller than the sum of its proper divisors (233273996).

231061204 is a wasteful number, since it uses less digits than its factorization.

231061204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276423 (or 276421 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 231061204 is about 15200.6974839972. The cubic root of 231061204 is about 613.6334289415.

It can be divided in two parts, 23106 and 1204, that added together give a triangular number (24310 = T220).

The spelling of 231061204 in words is "two hundred thirty-one million, sixty-one thousand, two hundred four".

Divisors: 1 2 4 11 19 22 38 44 76 209 418 836 276389 552778 1105556 3040279 5251391 6080558 10502782 12161116 21005564 57765301 115530602 231061204