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155293 = 831871
BaseRepresentation
bin100101111010011101
321220000121
4211322131
514432133
63154541
71214515
oct457235
9256017
10155293
11a6746
1275a51
13558b8
1440845
153102d
hex25e9d

155293 has 4 divisors (see below), whose sum is σ = 157248. Its totient is φ = 153340.

The previous prime is 155291. The next prime is 155299. The reversal of 155293 is 392551.

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: 392551 = 794969.

It is a cyclic number.

It is not a de Polignac number, because 155293 - 21 = 155291 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 (155291) 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 3 ways as a sum of consecutive naturals, for example, 853 + ... + 1018.

It is an arithmetic number, because the mean of its divisors is an integer number (39312).

2155293 is an apocalyptic number.

It is an amenable number.

155293 is a deficient number, since it is larger than the sum of its proper divisors (1955).

155293 is an equidigital number, since it uses as much as digits as its factorization.

155293 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1954.

The product of its digits is 1350, while the sum is 25.

The square root of 155293 is about 394.0723283866. The cubic root of 155293 is about 53.7506796381.

The spelling of 155293 in words is "one hundred fifty-five thousand, two hundred ninety-three".

Divisors: 1 83 1871 155293