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131239542066 = 238323175099
BaseRepresentation
bin111101000111001111…
…1000111110100110010
3110112202022100111200020
41322032133013310302
54122234310321231
6140142434504310
712324144462423
oct1721637076462
9415668314606
10131239542066
1150727333466
1221527a35096
13c4b6932289
1464cdd6d64a
153631ab0396
hex1e8e7c7d32

131239542066 has 24 divisors (see below), whose sum is σ = 265679667600. Its totient is φ = 43219433976.

The previous prime is 131239542047. The next prime is 131239542103. The reversal of 131239542066 is 660245932131.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1546216 + ... + 1628883.

It is an arithmetic number, because the mean of its divisors is an integer number (11069986150).

Almost surely, 2131239542066 is an apocalyptic number.

131239542066 is an abundant number, since it is smaller than the sum of its proper divisors (134440125534).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

131239542066 is an equidigital number, since it uses as much as digits as its factorization.

131239542066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3175270 (or 3175187 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 42.

The spelling of 131239542066 in words is "one hundred thirty-one billion, two hundred thirty-nine million, five hundred forty-two thousand, sixty-six".

Divisors: 1 2 3 6 83 166 249 498 6889 13778 20667 41334 3175099 6350198 9525297 19050594 263533217 527066434 790599651 1581199302 21873257011 43746514022 65619771033 131239542066