266131234 has 4 divisors (see below), whose sum is σ = 399196854. Its totient is φ = 133065616.

The previous prime is 266131223. The next prime is 266131247. The reversal of 266131234 is 432131662.

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

It can be written as a sum of positive squares in only one way, i.e., 260725609 + 5405625 = 16147^2 + 2325^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66532807 + ... + 66532810.

Almost surely, 2^266131234 is an apocalyptic number.

266131234 is a deficient number, since it is larger than the sum of its proper divisors (133065620).

266131234 is a wasteful number, since it uses less digits than its factorization.

266131234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133065619.

The product of its digits is 5184, while the sum is 28.

The square root of 266131234 is about 16313.5291705995. The cubic root of 266131234 is about 643.2285056244.

Adding to 266131234 its reverse (432131662), we get a palindrome (698262896).

The spelling of 266131234 in words is "two hundred sixty-six million, one hundred thirty-one thousand, two hundred thirty-four".