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131210230 = 2516778569
BaseRepresentation
bin1111101001000…
…01101111110110
3100010220011121011
413310201233312
5232042211410
621004142434
73152161054
oct764415766
9303804534
10131210230
1168079208
1237b37a1a
13212505b8
14135d71d4
15b7bc18a
hex7d21bf6

131210230 has 16 divisors (see below), whose sum is σ = 237595680. Its totient is φ = 52169152.

The previous prime is 131210221. The next prime is 131210237. The reversal of 131210230 is 32012131.

It is a super-2 number, since 2×1312102302 = 34432248913305800, 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 131210230.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131210237) 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 7 ways as a sum of consecutive naturals, for example, 37615 + ... + 40954.

It is an arithmetic number, because the mean of its divisors is an integer number (14849730).

Almost surely, 2131210230 is an apocalyptic number.

131210230 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

131210230 is a deficient number, since it is larger than the sum of its proper divisors (106385450).

131210230 is a wasteful number, since it uses less digits than its factorization.

131210230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78743.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 131210230 is about 11454.7034007869. The cubic root of 131210230 is about 508.1468435928.

Adding to 131210230 its reverse (32012131), we get a palindrome (163222361).

The spelling of 131210230 in words is "one hundred thirty-one million, two hundred ten thousand, two hundred thirty".

Divisors: 1 2 5 10 167 334 835 1670 78569 157138 392845 785690 13121023 26242046 65605115 131210230