268005531 has 4 divisors (see below), whose sum is σ = 357340712. Its totient is φ = 178670352.

The previous prime is 268005503. The next prime is 268005539. The reversal of 268005531 is 135500862.

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

It is not a de Polignac number, because 268005531 - 2⁷ = 268005403 is a prime.

It is a super-2 number, since 2×268005531² = 143653929293183922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (268005539) 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, 44667586 + ... + 44667591.

It is an arithmetic number, because the mean of its divisors is an integer number (89335178).

Almost surely, 2^268005531 is an apocalyptic number.

268005531 is a deficient number, since it is larger than the sum of its proper divisors (89335181).

268005531 is an equidigital number, since it uses as much as digits as its factorization.

268005531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89335180.

The product of its (nonzero) digits is 7200, while the sum is 30.

The square root of 268005531 is about 16370.8744726725. The cubic root of 268005531 is about 644.7350080255.

The spelling of 268005531 in words is "two hundred sixty-eight million, five thousand, five hundred thirty-one".