Base | Representation |
---|---|
bin | 11101000000001110… |
… | …100100000000100010 |
3 | 2222101100210022002112 |
4 | 131000032210000202 |
5 | 1002234414033102 |
6 | 22150120115322 |
7 | 2151510304121 |
oct | 350016440042 |
9 | 88340708075 |
10 | 31142330402 |
11 | 12231040847 |
12 | 6051605b42 |
13 | 2c23c47251 |
14 | 1716045ab8 |
15 | c24072252 |
hex | 7403a4022 |
31142330402 has 4 divisors (see below), whose sum is σ = 46713495606. Its totient is φ = 15571165200.
The previous prime is 31142330389. The next prime is 31142330407. The reversal of 31142330402 is 20403324113.
It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 20403324113 = 47 ⋅434113279.
It can be written as a sum of positive squares in only one way, i.e., 30642852601 + 499477801 = 175051^2 + 22349^2 .
It is not an unprimeable number, because it can be changed into a prime (31142330407) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (11) of ones.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7785582599 + ... + 7785582602.
Almost surely, 231142330402 is an apocalyptic number.
31142330402 is a deficient number, since it is larger than the sum of its proper divisors (15571165204).
31142330402 is a wasteful number, since it uses less digits than its factorization.
31142330402 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 15571165203.
The product of its (nonzero) digits is 1728, while the sum is 23.
Adding to 31142330402 its reverse (20403324113), we get a palindrome (51545654515).
The spelling of 31142330402 in words is "thirty-one billion, one hundred forty-two million, three hundred thirty thousand, four hundred two".
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