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3131013023 = 23136131001
BaseRepresentation
bin1011101010011111…
…0111011110011111
322002012112221102022
42322213313132133
522403014404043
61234404250355
7140406112565
oct27247673637
98065487368
103131013023
111367414476
127346a09bb
133ab896138
14219b8ba35
15134d22868
hexba9f779f

3131013023 has 4 divisors (see below), whose sum is σ = 3267144048. Its totient is φ = 2994882000.

The previous prime is 3131013013. The next prime is 3131013091. The reversal of 3131013023 is 3203101313.

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

It is a cyclic number.

It is not a de Polignac number, because 3131013023 - 24 = 3131013007 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3131012992 and 3131013010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3131013013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68065478 + ... + 68065523.

It is an arithmetic number, because the mean of its divisors is an integer number (816786012).

Almost surely, 23131013023 is an apocalyptic number.

3131013023 is a deficient number, since it is larger than the sum of its proper divisors (136131025).

3131013023 is a wasteful number, since it uses less digits than its factorization.

3131013023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136131024.

The product of its (nonzero) digits is 162, while the sum is 17.

The square root of 3131013023 is about 55955.4557036220. The cubic root of 3131013023 is about 1462.9459848893.

Adding to 3131013023 its reverse (3203101313), we get a palindrome (6334114336).

The spelling of 3131013023 in words is "three billion, one hundred thirty-one million, thirteen thousand, twenty-three".

Divisors: 1 23 136131001 3131013023