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1230130213 = 13212175981
BaseRepresentation
bin100100101010010…
…0100110000100101
310011201201002102021
41021110210300211
510004403131323
6322021543141
742324635314
oct11124446045
93151632367
101230130213
11581416044
122a3b74ab1
13167b13800
14b953427b
1572edd05d
hex49524c25

1230130213 has 12 divisors (see below), whose sum is σ = 1333351908. Its totient is φ = 1134382080.

The previous prime is 1230130199. The next prime is 1230130219. The reversal of 1230130213 is 3120310321.

It can be written as a sum of positive squares in 6 ways, for example, as 614197089 + 615933124 = 24783^2 + 24818^2 .

It is not a de Polignac number, because 1230130213 - 213 = 1230122021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1230130219) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 202683 + ... + 208663.

It is an arithmetic number, because the mean of its divisors is an integer number (111112659).

Almost surely, 21230130213 is an apocalyptic number.

1230130213 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1230130213 is a deficient number, since it is larger than the sum of its proper divisors (103221695).

1230130213 is a wasteful number, since it uses less digits than its factorization.

1230130213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7224 (or 7211 counting only the distinct ones).

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

The square root of 1230130213 is about 35073.2121853702. The cubic root of 1230130213 is about 1071.4790774575.

Adding to 1230130213 its reverse (3120310321), we get a palindrome (4350440534).

The spelling of 1230130213 in words is "one billion, two hundred thirty million, one hundred thirty thousand, two hundred thirteen".

Divisors: 1 13 169 1217 5981 15821 77753 205673 1010789 7278877 94625401 1230130213