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2131232201 = 71092793227
BaseRepresentation
bin111111100001000…
…0000010111001001
312111112021210221222
41333002000113021
513331043412301
6551251411425
7103546113650
oct17702002711
95445253858
102131232201
119a403032a
124b58b3b75
1327c704957
1416309a197
15c718631b
hex7f0805c9

2131232201 has 8 divisors (see below), whose sum is σ = 2458040640. Its totient is φ = 1810010448.

The previous prime is 2131232189. The next prime is 2131232203. The reversal of 2131232201 is 1022321312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-2131232201 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2131232201.

It is not an unprimeable number, because it can be changed into a prime (2131232203) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1395851 + ... + 1397376.

It is an arithmetic number, because the mean of its divisors is an integer number (307255080).

Almost surely, 22131232201 is an apocalyptic number.

It is an amenable number.

2131232201 is a deficient number, since it is larger than the sum of its proper divisors (326808439).

2131232201 is a wasteful number, since it uses less digits than its factorization.

2131232201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2793343.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 2131232201 is about 46165.2705071680. The cubic root of 2131232201 is about 1286.8964112808.

Adding to 2131232201 its reverse (1022321312), we get a palindrome (3153553513).

The spelling of 2131232201 in words is "two billion, one hundred thirty-one million, two hundred thirty-two thousand, two hundred one".

Divisors: 1 7 109 763 2793227 19552589 304461743 2131232201