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72715065131 = 292507416039
BaseRepresentation
bin100001110111000100…
…1111101011100101011
320221200122020001001102
41003232021331130223
52142410024041011
653223240112015
75152642566302
oct1035611753453
9227618201042
1072715065131
1128924838755
121211416560b
136b1aaa7277
14373b44b439
151d58b6e73b
hex10ee27d72b

72715065131 has 4 divisors (see below), whose sum is σ = 75222481200. Its totient is φ = 70207649064.

The previous prime is 72715065121. The next prime is 72715065139. The reversal of 72715065131 is 13156051727.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 72715065131 - 226 = 72647956267 is a prime.

It is a super-2 number, since 2×727150651312 (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72715065139) 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, 1253707991 + ... + 1253708048.

It is an arithmetic number, because the mean of its divisors is an integer number (18805620300).

Almost surely, 272715065131 is an apocalyptic number.

72715065131 is a deficient number, since it is larger than the sum of its proper divisors (2507416069).

72715065131 is a wasteful number, since it uses less digits than its factorization.

72715065131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2507416068.

The product of its (nonzero) digits is 44100, while the sum is 38.

The spelling of 72715065131 in words is "seventy-two billion, seven hundred fifteen million, sixty-five thousand, one hundred thirty-one".

Divisors: 1 29 2507416039 72715065131