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115144131 = 388743271
BaseRepresentation
bin1101101110011…
…11010111000011
322000122221001110
412313033113003
5213434103011
615231534403
72565465114
oct667172703
9260587043
10115144131
1159aa5543
123268a403
131ab1692b
141141420b
15a196ba6
hex6dcf5c3

115144131 has 8 divisors (see below), whose sum is σ = 153702144. Its totient is φ = 76674440.

The previous prime is 115144121. The next prime is 115144147. The reversal of 115144131 is 131441511.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 115144131 - 29 = 115143619 is a prime.

It is a super-2 number, since 2×1151441312 = 26516341807490322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 115144098 and 115144107.

It is not an unprimeable number, because it can be changed into a prime (115144121) by changing a digit.

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, 18975 + ... + 24296.

It is an arithmetic number, because the mean of its divisors is an integer number (19212768).

Almost surely, 2115144131 is an apocalyptic number.

115144131 is a deficient number, since it is larger than the sum of its proper divisors (38558013).

115144131 is an equidigital number, since it uses as much as digits as its factorization.

115144131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44161.

The product of its digits is 240, while the sum is 21.

The square root of 115144131 is about 10730.5233329973. The cubic root of 115144131 is about 486.4974880045.

Adding to 115144131 its reverse (131441511), we get a palindrome (246585642).

The spelling of 115144131 in words is "one hundred fifteen million, one hundred forty-four thousand, one hundred thirty-one".

Divisors: 1 3 887 2661 43271 129813 38381377 115144131