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33133145 = 555711897
BaseRepresentation
bin111111001100…
…1001001011001
32022100100010112
41332121021121
531440230040
63142054105
7551425043
oct176311131
968310115
1033133145
1117780471
12b11a335
136b31116
144586a93
152d97365
hex1f99259

33133145 has 8 divisors (see below), whose sum is σ = 39834504. Its totient is φ = 26456704.

The previous prime is 33133063. The next prime is 33133181. The reversal of 33133145 is 54133133.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 5895184 + 27237961 = 2428^2 + 5219^2 .

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 33133145 - 216 = 33067609 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 33133145.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3164 + ... + 8733.

It is an arithmetic number, because the mean of its divisors is an integer number (4979313).

Almost surely, 233133145 is an apocalyptic number.

It is an amenable number.

33133145 is a deficient number, since it is larger than the sum of its proper divisors (6701359).

33133145 is a wasteful number, since it uses less digits than its factorization.

33133145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12459.

The product of its digits is 1620, while the sum is 23.

The square root of 33133145 is about 5756.1397655026. The cubic root of 33133145 is about 321.1842351008.

Adding to 33133145 its reverse (54133133), we get a palindrome (87266278).

The spelling of 33133145 in words is "thirty-three million, one hundred thirty-three thousand, one hundred forty-five".

Divisors: 1 5 557 2785 11897 59485 6626629 33133145