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30145550 = 2521813331
BaseRepresentation
bin111001011111…
…1110000001110
32002201112220212
41302333300032
530204124200
62554042422
7514142621
oct162776016
962645825
1030145550
111601a886
12a119412
136326306
144009db8
1529a7035
hex1cbfc0e

30145550 has 24 divisors (see below), whose sum is σ = 56397432. Its totient is φ = 11988000.

The previous prime is 30145483. The next prime is 30145561. The reversal of 30145550 is 5554103.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7385 + ... + 10715.

It is an arithmetic number, because the mean of its divisors is an integer number (2349893).

Almost surely, 230145550 is an apocalyptic number.

30145550 is a deficient number, since it is larger than the sum of its proper divisors (26251882).

30145550 is a wasteful number, since it uses less digits than its factorization.

30145550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3524 (or 3519 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 23.

The square root of 30145550 is about 5490.4963345767. The cubic root of 30145550 is about 311.2249486566.

Adding to 30145550 its reverse (5554103), we get a palindrome (35699653).

The spelling of 30145550 in words is "thirty million, one hundred forty-five thousand, five hundred fifty".

Divisors: 1 2 5 10 25 50 181 362 905 1810 3331 4525 6662 9050 16655 33310 83275 166550 602911 1205822 3014555 6029110 15072775 30145550