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145007217 = 32109314741
BaseRepresentation
bin10001010010010…
…10001001110001
3101002212010111200
420221022021301
5244110212332
622220001413
73410353365
oct1051121161
9332763450
10145007217
1174942083
1240690269
13240714b4
14153892a5
15cae517c
hex8a4a271

145007217 has 12 divisors (see below), whose sum is σ = 209660724. Its totient is φ = 96576480.

The previous prime is 145007207. The next prime is 145007227. The reversal of 145007217 is 712700541.

It is an interprime number because it is at equal distance from previous prime (145007207) and next prime (145007227).

It can be written as a sum of positive squares in 2 ways, for example, as 142062561 + 2944656 = 11919^2 + 1716^2 .

It is not a de Polignac number, because 145007217 - 26 = 145007153 is a prime.

It is not an unprimeable number, because it can be changed into a prime (145007207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2467 + ... + 17207.

It is an arithmetic number, because the mean of its divisors is an integer number (17471727).

Almost surely, 2145007217 is an apocalyptic number.

It is an amenable number.

145007217 is a deficient number, since it is larger than the sum of its proper divisors (64653507).

145007217 is a wasteful number, since it uses less digits than its factorization.

145007217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15840 (or 15837 counting only the distinct ones).

The product of its (nonzero) digits is 1960, while the sum is 27.

The square root of 145007217 is about 12041.8942446776. The cubic root of 145007217 is about 525.3675032297.

Adding to 145007217 its reverse (712700541), we get a palindrome (857707758).

The spelling of 145007217 in words is "one hundred forty-five million, seven thousand, two hundred seventeen".