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130431201 = 343477067
BaseRepresentation
bin1111100011000…
…11100011100001
3100002102120222020
413301203203201
5231342244301
620535332053
73142434615
oct761434341
9302376866
10130431201
116769698a
1237821029
1321039b34
1413473345
15b6b6436
hex7c638e1

130431201 has 4 divisors (see below), whose sum is σ = 173908272. Its totient is φ = 86954132.

The previous prime is 130431199. The next prime is 130431271. The reversal of 130431201 is 102134031.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 102134031 = 334044677.

It is a cyclic number.

It is not a de Polignac number, because 130431201 - 21 = 130431199 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (130431271) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21738531 + ... + 21738536.

It is an arithmetic number, because the mean of its divisors is an integer number (43477068).

Almost surely, 2130431201 is an apocalyptic number.

It is an amenable number.

130431201 is a deficient number, since it is larger than the sum of its proper divisors (43477071).

130431201 is an equidigital number, since it uses as much as digits as its factorization.

130431201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43477070.

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

The square root of 130431201 is about 11420.6480113871. The cubic root of 130431201 is about 507.1391803816.

Adding to 130431201 its reverse (102134031), we get a palindrome (232565232).

The spelling of 130431201 in words is "one hundred thirty million, four hundred thirty-one thousand, two hundred one".

Divisors: 1 3 43477067 130431201