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31110000000 = 273571761
BaseRepresentation
bin11100111110010011…
…001110110110000000
32222022002221202010020
4130332103032312000
51002203130000000
622143003133440
72150635431312
oct347623166600
988262852106
1031110000000
1112214869502
126042814280
132c1a337631
141711a2b7b2
15c212d7ba0
hex73e4ced80

31110000000 has 512 divisors, whose sum is σ = 111163777920. Its totient is φ = 7680000000.

The previous prime is 31109999989. The next prime is 31110000011. The reversal of 31110000000 is 1113.

It is an interprime number because it is at equal distance from previous prime (31109999989) and next prime (31110000011).

It is a Harshad number since it is a multiple of its sum of digits (6).

It is a super Niven number, because it is divisible the sum of any subset of its (nonzero) digits.

It is a nialpdrome in base 10.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 509999970 + ... + 510000030.

Almost surely, 231110000000 is an apocalyptic number.

31110000000 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31110000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (55581888960).

31110000000 is an abundant number, since it is smaller than the sum of its proper divisors (80053777920).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31110000000 is an frugal number, since it uses more digits than its factorization.

31110000000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130 (or 88 counting only the distinct ones).

The product of its (nonzero) digits is 3, while the sum is 6.

Adding to 31110000000 its reverse (1113), we get a palindrome (31110001113).

The spelling of 31110000000 in words is "thirty-one billion, one hundred ten million", and thus it is an aban number.