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2020313031 = 3111723156577
BaseRepresentation
bin111100001101011…
…1000011111000111
312012210120112110120
41320122320133013
513114200004111
6532250153023
7101031243312
oct17032703707
95183515416
102020313031
119474610a0
12484722773
1326273a0c9
14152465979
15bc576406
hex786b87c7

2020313031 has 32 divisors (see below), whose sum is σ = 3246801408. Its totient is φ = 1102295040.

The previous prime is 2020313027. The next prime is 2020313041. The reversal of 2020313031 is 1303130202.

It is not a de Polignac number, because 2020313031 - 22 = 2020313027 is a prime.

It is a super-2 number, since 2×20203130312 = 8163329486456813922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2020313031.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2020313021) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 65386 + ... + 91191.

It is an arithmetic number, because the mean of its divisors is an integer number (101462544).

Almost surely, 22020313031 is an apocalyptic number.

2020313031 is a deficient number, since it is larger than the sum of its proper divisors (1226488377).

2020313031 is a wasteful number, since it uses less digits than its factorization.

2020313031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156631.

The product of its (nonzero) digits is 108, while the sum is 15.

The square root of 2020313031 is about 44947.8923977532. The cubic root of 2020313031 is about 1264.1721592853.

Adding to 2020313031 its reverse (1303130202), we get a palindrome (3323443233).

The spelling of 2020313031 in words is "two billion, twenty million, three hundred thirteen thousand, thirty-one".

Divisors: 1 3 11 17 23 33 51 69 187 253 391 561 759 1173 4301 12903 156577 469731 1722347 2661809 3601271 5167041 7985427 10803813 29279899 39613981 61221607 87839697 118841943 183664821 673437677 2020313031