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31054231020 = 22354791080523
BaseRepresentation
bin11100111010111110…
…011111010111101100
32222011020000101110110
4130322332133113230
51002044340343040
622133251540020
72146360415451
oct347276372754
988136011413
1031054231020
111219633843a
126027bba610
132c0b90c437
141708471828
15c1b46d980
hex73af9f5ec

31054231020 has 48 divisors (see below), whose sum is σ = 87133455360. Its totient is φ = 8263832256.

The previous prime is 31054230989. The next prime is 31054231031. The reversal of 31054231020 is 2013245013.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 511522 + ... + 569001.

It is an arithmetic number, because the mean of its divisors is an integer number (1815280320).

Almost surely, 231054231020 is an apocalyptic number.

31054231020 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31054231020 is an abundant number, since it is smaller than the sum of its proper divisors (56079224340).

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

31054231020 is a wasteful number, since it uses less digits than its factorization.

31054231020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1081014 (or 1081012 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 21.

Adding to 31054231020 its reverse (2013245013), we get a palindrome (33067476033).

The spelling of 31054231020 in words is "thirty-one billion, fifty-four million, two hundred thirty-one thousand, twenty".

Divisors: 1 2 3 4 5 6 10 12 15 20 30 60 479 958 1437 1916 2395 2874 4790 5748 7185 9580 14370 28740 1080523 2161046 3241569 4322092 5402615 6483138 10805230 12966276 16207845 21610460 32415690 64831380 517570517 1035141034 1552711551 2070282068 2587852585 3105423102 5175705170 6210846204 7763557755 10351410340 15527115510 31054231020