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131031031201 = 718718718743
BaseRepresentation
bin111101000001000001…
…1101101110110100001
3110112012210000001112121
41322002003231312201
54121322420444301
6140110025424241
712316033250140
oct1720203556641
9415183001477
10131031031201
115062a668134
122148a03b081
13c482688175
1464b03b3757
15361d6243a1
hex1e820edda1

131031031201 has 4 divisors (see below), whose sum is σ = 149749749952. Its totient is φ = 112312312452.

The previous prime is 131031031199. The next prime is 131031031217. The reversal of 131031031201 is 102130130131.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 131031031201 - 21 = 131031031199 is a prime.

It is a super-2 number, since 2×1310310312012 (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 (131031091201) 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, 9359359365 + ... + 9359359378.

It is an arithmetic number, because the mean of its divisors is an integer number (37437437488).

Almost surely, 2131031031201 is an apocalyptic number.

It is an amenable number.

131031031201 is a deficient number, since it is larger than the sum of its proper divisors (18718718751).

131031031201 is an equidigital number, since it uses as much as digits as its factorization.

131031031201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18718718750.

The product of its (nonzero) digits is 54, while the sum is 16.

Adding to 131031031201 its reverse (102130130131), we get a palindrome (233161161332).

The spelling of 131031031201 in words is "one hundred thirty-one billion, thirty-one million, thirty-one thousand, two hundred one".

Divisors: 1 7 18718718743 131031031201