268820531 has 16 divisors (see below), whose sum is σ = 324307200. Its totient is φ = 217673568.

The previous prime is 268820521. The next prime is 268820533. The reversal of 268820531 is 135028862.

It is not a de Polignac number, because 268820531 - 2¹⁸ = 268558387 is a prime.

It is a super-2 number, since 2×268820531² = 144528955774243922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 268820491 and 268820500.

It is not an unprimeable number, because it can be changed into a prime (268820533) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47741 + ... + 53073.

It is an arithmetic number, because the mean of its divisors is an integer number (20269200).

Almost surely, 2^268820531 is an apocalyptic number.

268820531 is a deficient number, since it is larger than the sum of its proper divisors (55486669).

268820531 is a wasteful number, since it uses less digits than its factorization.

268820531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5738.

The product of its (nonzero) digits is 23040, while the sum is 35.

The square root of 268820531 is about 16395.7473449672. The cubic root of 268820531 is about 645.3878891936.

The spelling of 268820531 in words is "two hundred sixty-eight million, eight hundred twenty thousand, five hundred thirty-one".