265312231 has 4 divisors (see below), whose sum is σ = 267093000. Its totient is φ = 263531464.

The previous prime is 265312141. The next prime is 265312247. The reversal of 265312231 is 132213562.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 265312231 - 2¹⁷ = 265181159 is a prime.

It is a super-2 number, since 2×265312231² = 140781159836394722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 265312196 and 265312205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (265312261) 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, 890161 + ... + 890458.

It is an arithmetic number, because the mean of its divisors is an integer number (66773250).

Almost surely, 2^265312231 is an apocalyptic number.

265312231 is a deficient number, since it is larger than the sum of its proper divisors (1780769).

265312231 is a wasteful number, since it uses less digits than its factorization.

265312231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1780768.

The product of its digits is 2160, while the sum is 25.

The square root of 265312231 is about 16288.4078718578. The cubic root of 265312231 is about 642.5679951456.

Adding to 265312231 its reverse (132213562), we get a palindrome (397525793).

It can be divided in two parts, 2653 and 12231, that added together give a square (14884 = 122²).

The spelling of 265312231 in words is "two hundred sixty-five million, three hundred twelve thousand, two hundred thirty-one".