Base | Representation |
---|---|
bin | 11101101111010010… |
… | …010100000011001001 |
3 | 10001102101101200110000 |
4 | 131233102110003021 |
5 | 1010344022432021 |
6 | 22400322113213 |
7 | 2210205120330 |
oct | 355722240311 |
9 | 101371350400 |
10 | 31931842761 |
11 | 125a67690a5 |
12 | 6231aab809 |
13 | 301b697620 |
14 | 178cc40d17 |
15 | c6d526b26 |
hex | 76f4940c9 |
31931842761 has 40 divisors (see below), whose sum is σ = 58708510784. Its totient is φ = 16843165920.
The previous prime is 31931842729. The next prime is 31931842819. The reversal of 31931842761 is 16724813913.
It is not a de Polignac number, because 31931842761 - 25 = 31931842729 is a prime.
It is a super-2 number, since 2×319318427612 (a number of 22 digits) contains 22 as substring.
It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.
It is not an unprimeable number, because it can be changed into a prime (31931842711) 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 39 ways as a sum of consecutive naturals, for example, 2158675 + ... + 2173416.
Almost surely, 231931842761 is an apocalyptic number.
It is an amenable number.
31931842761 is a deficient number, since it is larger than the sum of its proper divisors (26776668023).
31931842761 is a wasteful number, since it uses less digits than its factorization.
31931842761 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 4332123 (or 4332114 counting only the distinct ones).
The product of its digits is 217728, while the sum is 45.
The spelling of 31931842761 in words is "thirty-one billion, nine hundred thirty-one million, eight hundred forty-two thousand, seven hundred sixty-one".
• e-mail: info -at- numbersaplenty.com • Privacy notice • done in 0.066 sec. • engine limits •