Base | Representation |
---|---|
bin | 1110011111111… |
… | …11001100111110 |
3 | 22110212112010020 |
4 | 13033333030332 |
5 | 222114202200 |
6 | 20022553010 |
7 | 3004564635 |
oct | 717771476 |
9 | 273775106 |
10 | 121631550 |
11 | 62726647 |
12 | 34898766 |
13 | 1c278741 |
14 | 1222251c |
15 | aa28ea0 |
hex | 73ff33e |
121631550 has 48 divisors (see below), whose sum is σ = 302324400. Its totient is φ = 32362240.
The previous prime is 121631527. The next prime is 121631579. The reversal of 121631550 is 55136121.
It is a self number, because there is not a number n which added to its sum of digits gives 121631550.
It is a congruent number.
It is an unprimeable number.
It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 115426 + ... + 116474.
It is an arithmetic number, because the mean of its divisors is an integer number (6298425).
Almost surely, 2121631550 is an apocalyptic number.
121631550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.
121631550 is an abundant number, since it is smaller than the sum of its proper divisors (180692850).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
121631550 is a wasteful number, since it uses less digits than its factorization.
121631550 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 1837 (or 1832 counting only the distinct ones).
The product of its (nonzero) digits is 900, while the sum is 24.
The square root of 121631550 is about 11028.6694573734. The cubic root of 121631550 is about 495.4677753416.
Adding to 121631550 its reverse (55136121), we get a palindrome (176767671).
The spelling of 121631550 in words is "one hundred twenty-one million, six hundred thirty-one thousand, five hundred fifty".
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