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2131031210 = 257112767573
BaseRepresentation
bin111111100000100…
…1111010010101010
312111111220121020212
41333001033102222
513331020444320
6551243221122
7103544315660
oct17701172252
95444817225
102131031210
119a3a03320
124b58177a2
1327c664319
14163046c30
15c71469c5
hex7f04f4aa

2131031210 has 32 divisors (see below), whose sum is σ = 4782367872. Its totient is φ = 664217280.

The previous prime is 2131031197. The next prime is 2131031237. The reversal of 2131031210 is 121301312.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 1383017 + ... + 1384556.

It is an arithmetic number, because the mean of its divisors is an integer number (149448996).

Almost surely, 22131031210 is an apocalyptic number.

2131031210 is an abundant number, since it is smaller than the sum of its proper divisors (2651336662).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2131031210 is a wasteful number, since it uses less digits than its factorization.

2131031210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2767598.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 2131031210 is about 46163.0935921760. The cubic root of 2131031210 is about 1286.8559553843.

Adding to 2131031210 its reverse (121301312), we get a palindrome (2252332522).

The spelling of 2131031210 in words is "two billion, one hundred thirty-one million, thirty-one thousand, two hundred ten".

Divisors: 1 2 5 7 10 11 14 22 35 55 70 77 110 154 385 770 2767573 5535146 13837865 19373011 27675730 30443303 38746022 60886606 96865055 152216515 193730110 213103121 304433030 426206242 1065515605 2131031210