268131731 has 4 divisors (see below), whose sum is σ = 306436272. Its totient is φ = 229827192.

The previous prime is 268131727. The next prime is 268131733. The reversal of 268131731 is 137131862.

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

It is not a de Polignac number, because 268131731 - 2² = 268131727 is a prime.

It is a super-2 number, since 2×268131731² = 143789250338112722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (268131733) 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, 19152260 + ... + 19152273.

It is an arithmetic number, because the mean of its divisors is an integer number (76609068).

Almost surely, 2^268131731 is an apocalyptic number.

268131731 is a deficient number, since it is larger than the sum of its proper divisors (38304541).

268131731 is an equidigital number, since it uses as much as digits as its factorization.

268131731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38304540.

The product of its digits is 6048, while the sum is 32.

The square root of 268131731 is about 16374.7284252289. The cubic root of 268131731 is about 644.8361909996.

It can be divided in two parts, 268131 and 731, that added together give a palindrome (268862).

The spelling of 268131731 in words is "two hundred sixty-eight million, one hundred thirty-one thousand, seven hundred thirty-one".