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131441144 = 23175916381
BaseRepresentation
bin1111101010110…
…10000111111000
3100011022220100112
413311122013320
5232122104034
621013123452
73154142222
oct765320770
9304286315
10131441144
116821674a
1238029588
1321301733
1413657412
15b8157ce
hex7d5a1f8

131441144 has 32 divisors (see below), whose sum is σ = 265388400. Its totient is φ = 60802560.

The previous prime is 131441117. The next prime is 131441243. The reversal of 131441144 is 441144131.

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, 167 + ... + 16214.

Almost surely, 2131441144 is an apocalyptic number.

It is an amenable number.

131441144 is an abundant number, since it is smaller than the sum of its proper divisors (133947256).

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

131441144 is a wasteful number, since it uses less digits than its factorization.

131441144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16463 (or 16459 counting only the distinct ones).

The product of its digits is 768, while the sum is 23.

The square root of 131441144 is about 11464.7784104186. The cubic root of 131441144 is about 508.4447610489. Note that the first 3 decimals are identical.

Adding to 131441144 its reverse (441144131), we get a palindrome (572585275).

The spelling of 131441144 in words is "one hundred thirty-one million, four hundred forty-one thousand, one hundred forty-four".

Divisors: 1 2 4 8 17 34 59 68 118 136 236 472 1003 2006 4012 8024 16381 32762 65524 131048 278477 556954 966479 1113908 1932958 2227816 3865916 7731832 16430143 32860286 65720572 131441144