264785231 has 2 divisors, whose sum is σ = 264785232. Its totient is φ = 264785230.

The previous prime is 264785219. The next prime is 264785233. The reversal of 264785231 is 132587462.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 264785231 - 2¹⁸ = 264523087 is a prime.

It is a super-2 number, since 2×264785231² = 140222437111446722, which contains 22 as substring.

Together with 264785233, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (264785233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132392615 + 132392616.

It is an arithmetic number, because the mean of its divisors is an integer number (132392616).

Almost surely, 2^264785231 is an apocalyptic number.

264785231 is a deficient number, since it is larger than the sum of its proper divisors (1).

264785231 is an equidigital number, since it uses as much as digits as its factorization.

264785231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 80640, while the sum is 38.

The square root of 264785231 is about 16272.2226816130. Note that the first 3 decimals coincide. The cubic root of 264785231 is about 642.1422605392.

It can be divided in two parts, 2647 and 85231, that added together give a palindrome (87878).

The spelling of 264785231 in words is "two hundred sixty-four million, seven hundred eighty-five thousand, two hundred thirty-one".