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13231401 = 343109941
BaseRepresentation
bin110010011110…
…010100101001
3220220020001220
4302132110221
511341401101
61151332253
7220315341
oct62362451
926806056
1013231401
117517a47
124521089
132983641
141a85d21
151265636
hexc9e529

13231401 has 16 divisors (see below), whose sum is σ = 18237120. Its totient is φ = 8527680.

The previous prime is 13231373. The next prime is 13231411. The reversal of 13231401 is 10413231.

13231401 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13231401 - 25 = 13231369 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (13231411) 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, 13591 + ... + 14531.

It is an arithmetic number, because the mean of its divisors is an integer number (1139820).

Almost surely, 213231401 is an apocalyptic number.

It is an amenable number.

13231401 is a deficient number, since it is larger than the sum of its proper divisors (5005719).

13231401 is a wasteful number, since it uses less digits than its factorization.

13231401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1096.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 13231401 is about 3637.4992783504. The cubic root of 13231401 is about 236.5204031344.

Adding to 13231401 its reverse (10413231), we get a palindrome (23644632).

The spelling of 13231401 in words is "thirteen million, two hundred thirty-one thousand, four hundred one".

Divisors: 1 3 43 109 129 327 941 2823 4687 14061 40463 102569 121389 307707 4410467 13231401