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102103130031 = 3719255897569
BaseRepresentation
bin101111100010111010…
…0100001111110101111
3100202112202001102021120
41133011310201332233
53133101400130111
6114523332232023
710243132166640
oct1370564417657
9322482042246
10102103130031
113a3356118a1
121795616b613
139822455196
144d284c36c7
1529c8bbe406
hex17c5d21faf

102103130031 has 16 divisors (see below), whose sum is σ = 163774444800. Its totient is φ = 55273874688.

The previous prime is 102103130021. The next prime is 102103130057. The reversal of 102103130031 is 130031301201.

It is not a de Polignac number, because 102103130031 - 227 = 101968912303 is a prime.

It is a super-2 number, since 2×1021031300312 (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102103130021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 127948386 + ... + 127949183.

It is an arithmetic number, because the mean of its divisors is an integer number (10235902800).

Almost surely, 2102103130031 is an apocalyptic number.

102103130031 is a deficient number, since it is larger than the sum of its proper divisors (61671314769).

102103130031 is a wasteful number, since it uses less digits than its factorization.

102103130031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255897598.

The product of its (nonzero) digits is 54, while the sum is 15.

Adding to 102103130031 its reverse (130031301201), we get a palindrome (232134431232).

The spelling of 102103130031 in words is "one hundred two billion, one hundred three million, one hundred thirty thousand, thirty-one".

Divisors: 1 3 7 19 21 57 133 399 255897569 767692707 1791282983 4862053811 5373848949 14586161433 34034376677 102103130031