255243293 has 4 divisors (see below), whose sum is σ = 255776640. Its totient is φ = 254709948.

The previous prime is 255243277. The next prime is 255243299. The reversal of 255243293 is 392342552.

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.

It is a cyclic number.

It is not a de Polignac number, because 255243293 - 2⁴ = 255243277 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 (255243299) 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, 265955 + ... + 266912.

It is an arithmetic number, because the mean of its divisors is an integer number (63944160).

Almost surely, 2^255243293 is an apocalyptic number.

It is an amenable number.

255243293 is a deficient number, since it is larger than the sum of its proper divisors (533347).

255243293 is an equidigital number, since it uses as much as digits as its factorization.

255243293 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 533346.

The product of its digits is 64800, while the sum is 35.

The square root of 255243293 is about 15976.3354058432. The cubic root of 255243293 is about 634.3341796572.

The spelling of 255243293 in words is "two hundred fifty-five million, two hundred forty-three thousand, two hundred ninety-three".