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2000202131 = 7128171861
BaseRepresentation
bin111011100111000…
…1010100110010011
312011101201210111102
41313032022212103
513044022432011
6530251135015
7100365303044
oct16716124623
95141653442
102000202131
11937075514
12479a4446b
1325b518375
1414d90c8cb
15ba90273b
hex7738a993

2000202131 has 4 divisors (see below), whose sum is σ = 2028374064. Its totient is φ = 1972030200.

The previous prime is 2000202073. The next prime is 2000202161. The reversal of 2000202131 is 1312020002.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1312020002 = 2656010001.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-2000202131 is a prime.

It is a super-2 number, since 2×20002021312 = 8001617129713882322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2000202161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14085860 + ... + 14086001.

It is an arithmetic number, because the mean of its divisors is an integer number (507093516).

Almost surely, 22000202131 is an apocalyptic number.

2000202131 is a deficient number, since it is larger than the sum of its proper divisors (28171933).

2000202131 is an equidigital number, since it uses as much as digits as its factorization.

2000202131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28171932.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 2000202131 is about 44723.6193861812. The cubic root of 2000202131 is about 1259.9634933153.

Adding to 2000202131 its reverse (1312020002), we get a palindrome (3312222133).

The spelling of 2000202131 in words is "two billion, two hundred two thousand, one hundred thirty-one".

Divisors: 1 71 28171861 2000202131