Base | Representation |
---|---|
bin | 11101010111111100… |
… | …010110111000011110 |
3 | 10000102002110201222111 |
4 | 131113330112320132 |
5 | 1004043243224410 |
6 | 22253412104234 |
7 | 2164411241413 |
oct | 352774267036 |
9 | 100362421874 |
10 | 31540211230 |
11 | 12415699580 |
12 | 614290507a |
13 | 2c884c60a8 |
14 | 1752c1810a |
15 | c48e67b8a |
hex | 757f16e1e |
31540211230 has 64 divisors (see below), whose sum is σ = 62440632000. Its totient is φ = 11375493120.
The previous prime is 31540211189. The next prime is 31540211237. The reversal of 31540211230 is 3211204513.
It is a happy number.
It is a super-2 number, since 2×315402112302 (a number of 22 digits) contains 22 as substring.
It is a Harshad number since it is a multiple of its sum of digits (22).
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (31540211237) by changing a digit.
It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 18896836 + ... + 18898504.
It is an arithmetic number, because the mean of its divisors is an integer number (975634875).
Almost surely, 231540211230 is an apocalyptic number.
31540211230 is a deficient number, since it is larger than the sum of its proper divisors (30900420770).
31540211230 is a wasteful number, since it uses less digits than its factorization.
31540211230 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 2989.
The product of its (nonzero) digits is 720, while the sum is 22.
Adding to 31540211230 its reverse (3211204513), we get a palindrome (34751415743).
The spelling of 31540211230 in words is "thirty-one billion, five hundred forty million, two hundred eleven thousand, two hundred thirty".
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