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131830297031 = 451929172449
BaseRepresentation
bin111101011000110110…
…0101011000111000111
3110121021110221222010202
41322301230223013013
54124442024001111
6140321220441115
712344610015206
oct1726154530707
9417243858122
10131830297031
11509aa847404
122167184919b
13c57c141b24
1465485cb23d
1536688a3b3b
hex1eb1b2b1c7

131830297031 has 4 divisors (see below), whose sum is σ = 131859474000. Its totient is φ = 131801120064.

The previous prime is 131830297013. The next prime is 131830297051. The reversal of 131830297031 is 130792038131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 130792038131 = 889971469623.

It is a cyclic number.

It is not a de Polignac number, because 131830297031 - 210 = 131830296007 is a prime.

It is a super-2 number, since 2×1318302970312 (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131830297051) 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, 14581706 + ... + 14590743.

It is an arithmetic number, because the mean of its divisors is an integer number (32964868500).

Almost surely, 2131830297031 is an apocalyptic number.

131830297031 is a deficient number, since it is larger than the sum of its proper divisors (29176969).

131830297031 is an equidigital number, since it uses as much as digits as its factorization.

131830297031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29176968.

The product of its (nonzero) digits is 27216, while the sum is 38.

The spelling of 131830297031 in words is "one hundred thirty-one billion, eight hundred thirty million, two hundred ninety-seven thousand, thirty-one".

Divisors: 1 4519 29172449 131830297031