265531393 has 4 divisors (see below), whose sum is σ = 266077120. Its totient is φ = 264985668.

The previous prime is 265531379. The next prime is 265531397. The reversal of 265531393 is 393135562.

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: 393135562 = 2 ⋅196567781.

It is a cyclic number.

It is not a de Polignac number, because 265531393 - 2¹⁷ = 265400321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (265531397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 272133 + ... + 273106.

It is an arithmetic number, because the mean of its divisors is an integer number (66519280).

Almost surely, 2^265531393 is an apocalyptic number.

It is an amenable number.

265531393 is a deficient number, since it is larger than the sum of its proper divisors (545727).

265531393 is an equidigital number, since it uses as much as digits as its factorization.

265531393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 545726.

The product of its digits is 72900, while the sum is 37.

The square root of 265531393 is about 16295.1340282920. The cubic root of 265531393 is about 642.7448782184.

The spelling of 265531393 in words is "two hundred sixty-five million, five hundred thirty-one thousand, three hundred ninety-three".