Base | Representation |
---|---|
bin | 1011101111000… |
… | …0111101101111 |
3 | 10102121201012001 |
4 | 2323300331233 |
5 | 100100041422 |
6 | 4514553131 |
7 | 1135242610 |
oct | 273607557 |
9 | 112551161 |
10 | 49221487 |
11 | 25869917 |
12 | 145987a7 |
13 | a274c53 |
14 | 6773c07 |
15 | 44c4227 |
hex | 2ef0f6f |
49221487 has 4 divisors (see below), whose sum is σ = 56253136. Its totient is φ = 42189840.
The previous prime is 49221481. The next prime is 49221499. The reversal of 49221487 is 78412294.
It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78412294 = 2 ⋅39206147.
It is not a de Polignac number, because 49221487 - 23 = 49221479 is a prime.
It is a Duffinian number.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (49221481) by changing a digit.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3515814 + ... + 3515827.
It is an arithmetic number, because the mean of its divisors is an integer number (14063284).
Almost surely, 249221487 is an apocalyptic number.
49221487 is a deficient number, since it is larger than the sum of its proper divisors (7031649).
49221487 is an equidigital number, since it uses as much as digits as its factorization.
49221487 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 7031648.
The product of its digits is 32256, while the sum is 37.
The square root of 49221487 is about 7015.8026625611. The cubic root of 49221487 is about 366.4810951699.
The spelling of 49221487 in words is "forty-nine million, two hundred twenty-one thousand, four hundred eighty-seven".
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