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144563557 = 228763211
BaseRepresentation
bin10001001110111…
…01110101100101
3101002000120220211
420213131311211
5244002013212
622202255421
73403525045
oct1047356545
9332016824
10144563557
1174669816
12404b7571
1323c47588
14152b1725
15ca589a7
hex89ddd65

144563557 has 4 divisors (see below), whose sum is σ = 144629056. Its totient is φ = 144498060.

The previous prime is 144563519. The next prime is 144563561. The reversal of 144563557 is 755365441.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 755365441 = 2113579931.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-144563557 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144563567) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29319 + ... + 33892.

It is an arithmetic number, because the mean of its divisors is an integer number (36157264).

Almost surely, 2144563557 is an apocalyptic number.

It is an amenable number.

144563557 is a deficient number, since it is larger than the sum of its proper divisors (65499).

144563557 is an equidigital number, since it uses as much as digits as its factorization.

144563557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65498.

The product of its digits is 252000, while the sum is 40.

The square root of 144563557 is about 12023.4586122297. The cubic root of 144563557 is about 524.8311559840.

The spelling of 144563557 in words is "one hundred forty-four million, five hundred sixty-three thousand, five hundred fifty-seven".

Divisors: 1 2287 63211 144563557