231075811 has 4 divisors (see below), whose sum is σ = 232285824. Its totient is φ = 229865800.

The previous prime is 231075791. The next prime is 231075833. The reversal of 231075811 is 118570132.

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

It is a cyclic number.

It is not a de Polignac number, because 231075811 - 2¹⁷ = 230944739 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 231075811.

It is not an unprimeable number, because it can be changed into a prime (231075881) 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, 604720 + ... + 605101.

It is an arithmetic number, because the mean of its divisors is an integer number (58071456).

Almost surely, 2^231075811 is an apocalyptic number.

231075811 is a deficient number, since it is larger than the sum of its proper divisors (1210013).

231075811 is a wasteful number, since it uses less digits than its factorization.

231075811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1210012.

The product of its (nonzero) digits is 1680, while the sum is 28.

The square root of 231075811 is about 15201.1779477776. The cubic root of 231075811 is about 613.6463593606.

The spelling of 231075811 in words is "two hundred thirty-one million, seventy-five thousand, eight hundred eleven".