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23131200030 = 235771040001
BaseRepresentation
bin10101100010101110…
…100001101000011110
32012201001102201012020
4111202232201220132
5334333041400110
614343141521010
71446132645651
oct254256415036
965631381166
1023131200030
11989aa60a44
124596713166
132248307c13
1411960c1898
15905ac8d70
hex562ba1a1e

23131200030 has 16 divisors (see below), whose sum is σ = 55514880144. Its totient is φ = 6168320000.

The previous prime is 23131200019. The next prime is 23131200143. The reversal of 23131200030 is 3000213132.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a junction number, because it is equal to n+sod(n) for n = 23131199982 and 23131200009.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 385519971 + ... + 385520030.

It is an arithmetic number, because the mean of its divisors is an integer number (3469680009).

Almost surely, 223131200030 is an apocalyptic number.

23131200030 is an abundant number, since it is smaller than the sum of its proper divisors (32383680114).

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

23131200030 is a wasteful number, since it uses less digits than its factorization.

23131200030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 771040011.

The product of its (nonzero) digits is 108, while the sum is 15.

Adding to 23131200030 its reverse (3000213132), we get a palindrome (26131413162).

The spelling of 23131200030 in words is "twenty-three billion, one hundred thirty-one million, two hundred thousand, thirty".

Divisors: 1 2 3 5 6 10 15 30 771040001 1542080002 2313120003 3855200005 4626240006 7710400010 11565600015 23131200030