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102230031972 = 22343937211441
BaseRepresentation
bin101111100110101100…
…0100111111001100100
3100202212120211201000110
41133031120213321210
53133331342010342
6114544104213020
710246232635305
oct1371530477144
9322776751013
10102230031972
113a3a0208132
121799076a170
1398428277a3
144d3b2b87ac
1529d4dd9c9c
hex17cd627e64

102230031972 has 48 divisors (see below), whose sum is σ = 244345758272. Its totient is φ = 33248517120.

The previous prime is 102230031941. The next prime is 102230031973. The reversal of 102230031972 is 279130032201.

It is a super-2 number, since 2×1022300319722 (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (102230031973) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 377772 + ... + 589212.

Almost surely, 2102230031972 is an apocalyptic number.

102230031972 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

102230031972 is an abundant number, since it is smaller than the sum of its proper divisors (142115726300).

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

102230031972 is a wasteful number, since it uses less digits than its factorization.

102230031972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212428 (or 212426 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 30.

The spelling of 102230031972 in words is "one hundred two billion, two hundred thirty million, thirty-one thousand, nine hundred seventy-two".

Divisors: 1 2 3 4 6 12 43 86 129 172 258 516 937 1874 2811 3748 5622 11244 40291 80582 120873 161164 211441 241746 422882 483492 634323 845764 1268646 2537292 9091963 18183926 27275889 36367852 54551778 109103556 198120217 396240434 594360651 792480868 1188721302 2377442604 8519169331 17038338662 25557507993 34076677324 51115015986 102230031972