Search a number
-
+
1555223 is a prime number
BaseRepresentation
bin101111011101100010111
32221000100212
411323230113
5344231343
653200035
716135115
oct5735427
92830325
101555223
1197250a
1263001b
13425b67
142c6ab5
1520ac18
hex17bb17

1555223 has 2 divisors, whose sum is σ = 1555224. Its totient is φ = 1555222.

The previous prime is 1555199. The next prime is 1555231. The reversal of 1555223 is 3225551.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1555223 - 26 = 1555159 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1555243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 777611 + 777612.

It is an arithmetic number, because the mean of its divisors is an integer number (777612).

21555223 is an apocalyptic number.

1555223 is a deficient number, since it is larger than the sum of its proper divisors (1).

1555223 is an equidigital number, since it uses as much as digits as its factorization.

1555223 is an evil number, because the sum of its binary digits is even.

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

The square root of 1555223 is about 1247.0858029823. The cubic root of 1555223 is about 115.8592972984.

The spelling of 1555223 in words is "one million, five hundred fifty-five thousand, two hundred twenty-three".