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2131130231 = 19127883187
BaseRepresentation
bin111111100000110…
…0111011101110111
312111112002122002022
41333001213131313
513331032131411
6551245303355
7103545210446
oct17701473567
95445078068
102131130231
119a3a7075a
124b5864b5b
1327c69a409
14163070d5d
15c7165edb
hex7f067777

2131130231 has 8 divisors (see below), whose sum is σ = 2260961280. Its totient is φ = 2003065848.

The previous prime is 2131130219. The next prime is 2131130233. The reversal of 2131130231 is 1320311312.

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

It is a cyclic number.

It is not a de Polignac number, because 2131130231 - 218 = 2130868087 is a prime.

It is a super-2 number, since 2×21311302312 = 9083432122964226722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2131130233) 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, 439181 + ... + 444006.

It is an arithmetic number, because the mean of its divisors is an integer number (282620160).

Almost surely, 22131130231 is an apocalyptic number.

2131130231 is a deficient number, since it is larger than the sum of its proper divisors (129831049).

2131130231 is a wasteful number, since it uses less digits than its factorization.

2131130231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 883333.

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 2131130231 is about 46164.1660923275. The cubic root of 2131130231 is about 1286.8758868599.

Adding to 2131130231 its reverse (1320311312), we get a palindrome (3451441543).

The spelling of 2131130231 in words is "two billion, one hundred thirty-one million, one hundred thirty thousand, two hundred thirty-one".

Divisors: 1 19 127 2413 883187 16780553 112164749 2131130231