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30031143200 = 255237538929
BaseRepresentation
bin11011111101111111…
…101110000100100000
32212111220220010210222
4123331333232010200
5443000433040300
621443543342212
72112125335232
oct337577560440
985456803728
1030031143200
1111810885413
1259a1451968
132aa797a526
14164c634252
15bab72b785
hex6fdfee120

30031143200 has 36 divisors (see below), whose sum is σ = 73313530290. Its totient is φ = 12012456960.

The previous prime is 30031143173. The next prime is 30031143257. The reversal of 30031143200 is 234113003.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 18269306896 + 11761836304 = 135164^2 + 108452^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 18768665 + ... + 18770264.

Almost surely, 230031143200 is an apocalyptic number.

It is an amenable number.

30031143200 is an abundant number, since it is smaller than the sum of its proper divisors (43282387090).

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

30031143200 is a wasteful number, since it uses less digits than its factorization.

30031143200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37538949 (or 37538936 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 17.

Adding to 30031143200 its reverse (234113003), we get a palindrome (30265256203).

The spelling of 30031143200 in words is "thirty billion, thirty-one million, one hundred forty-three thousand, two hundred".

Divisors: 1 2 4 5 8 10 16 20 25 32 40 50 80 100 160 200 400 800 37538929 75077858 150155716 187694645 300311432 375389290 600622864 750778580 938473225 1201245728 1501557160 1876946450 3003114320 3753892900 6006228640 7507785800 15015571600 30031143200