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2105531142 = 2311132453999
BaseRepresentation
bin111110101111111…
…1101101100000110
312102201221001201220
41331133331230012
513303003444032
6544532501210
7103114501521
oct17537755406
95381831656
102105531142
11990576790
124a917a806
132772a6620
1415d8c9bb8
15c4cab12c
hex7d7fdb06

2105531142 has 32 divisors (see below), whose sum is σ = 4947264000. Its totient is φ = 588959520.

The previous prime is 2105531137. The next prime is 2105531161. The reversal of 2105531142 is 2411355012.

It is a happy number.

It is a super-2 number, since 2×21055311422 = 8866522779863648328, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1226142 + ... + 1227857.

It is an arithmetic number, because the mean of its divisors is an integer number (154602000).

Almost surely, 22105531142 is an apocalyptic number.

2105531142 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

2105531142 is an abundant number, since it is smaller than the sum of its proper divisors (2841732858).

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

2105531142 is a wasteful number, since it uses less digits than its factorization.

2105531142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2454028.

The product of its (nonzero) digits is 1200, while the sum is 24.

The square root of 2105531142 is about 45886.0669702689. The cubic root of 2105531142 is about 1281.7024754075.

Adding to 2105531142 its reverse (2411355012), we get a palindrome (4516886154).

The spelling of 2105531142 in words is "two billion, one hundred five million, five hundred thirty-one thousand, one hundred forty-two".

Divisors: 1 2 3 6 11 13 22 26 33 39 66 78 143 286 429 858 2453999 4907998 7361997 14723994 26993989 31901987 53987978 63803974 80981967 95705961 161963934 191411922 350921857 701843714 1052765571 2105531142