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144000031 = 7191082707
BaseRepresentation
bin10001001010101…
…00010000011111
3101000221221220111
420211110100133
5243331000111
622142230451
73365660110
oct1045242037
9330857814
10144000031
117431439a
1240285427
1323aaac26
14151a6207
15c996a21
hex895441f

144000031 has 8 divisors (see below), whose sum is σ = 173233280. Its totient is φ = 116932248.

The previous prime is 144000023. The next prime is 144000037. The reversal of 144000031 is 130000441.

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 144000031 - 23 = 144000023 is a prime.

It is a super-2 number, since 2×1440000312 = 41472017856001922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 143999975 and 144000020.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144000037) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 541221 + ... + 541486.

It is an arithmetic number, because the mean of its divisors is an integer number (21654160).

Almost surely, 2144000031 is an apocalyptic number.

144000031 is a deficient number, since it is larger than the sum of its proper divisors (29233249).

144000031 is a wasteful number, since it uses less digits than its factorization.

144000031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1082733.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 144000031 is about 12000.0012916666. The cubic root of 144000031 is about 524.1483164543.

Adding to 144000031 its reverse (130000441), we get a palindrome (274000472).

The spelling of 144000031 in words is "one hundred forty-four million, thirty-one", and thus it is an aban number.

Divisors: 1 7 19 133 1082707 7578949 20571433 144000031