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130131223 = 971341559
BaseRepresentation
bin1111100000110…
…10010100010111
3100001212100110221
413300122110113
5231303144343
620525055211
73140045215
oct760322427
9301770427
10130131223
1167501572
12376b7507
1320c63431
14133d5cb5
15b6575ed
hex7c1a517

130131223 has 4 divisors (see below), whose sum is σ = 131472880. Its totient is φ = 128789568.

The previous prime is 130131191. The next prime is 130131229. The reversal of 130131223 is 322131031.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 322131031 = 2314005697.

It is a cyclic number.

It is not a de Polignac number, because 130131223 - 25 = 130131191 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 130131197 and 130131206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (130131229) 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, 670683 + ... + 670876.

It is an arithmetic number, because the mean of its divisors is an integer number (32868220).

Almost surely, 2130131223 is an apocalyptic number.

130131223 is a deficient number, since it is larger than the sum of its proper divisors (1341657).

130131223 is an equidigital number, since it uses as much as digits as its factorization.

130131223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1341656.

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 130131223 is about 11407.5073087857. The cubic root of 130131223 is about 506.7500930742.

Adding to 130131223 its reverse (322131031), we get a palindrome (452262254).

The spelling of 130131223 in words is "one hundred thirty million, one hundred thirty-one thousand, two hundred twenty-three".

Divisors: 1 97 1341559 130131223