268159531 has 4 divisors (see below), whose sum is σ = 268192432. Its totient is φ = 268126632.

The previous prime is 268159523. The next prime is 268159537. The reversal of 268159531 is 135951862.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 135951862 = 2 ⋅67975931.

It is a cyclic number.

It is not a de Polignac number, because 268159531 - 2³ = 268159523 is a prime.

It is a super-2 number, since 2×268159531² = 143819068132279922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (268159537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5881 + ... + 23893.

It is an arithmetic number, because the mean of its divisors is an integer number (67048108).

Almost surely, 2^268159531 is an apocalyptic number.

268159531 is a deficient number, since it is larger than the sum of its proper divisors (32901).

268159531 is a wasteful number, since it uses less digits than its factorization.

268159531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32900.

The product of its digits is 64800, while the sum is 40.

The square root of 268159531 is about 16375.5772722674. The cubic root of 268159531 is about 644.8584758501.

The spelling of 268159531 in words is "two hundred sixty-eight million, one hundred fifty-nine thousand, five hundred thirty-one".