231870011 has 4 divisors (see below), whose sum is σ = 233922072. Its totient is φ = 229817952.

The previous prime is 231869999. The next prime is 231870017. The reversal of 231870011 is 110078132.

It is a happy number.

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 231870011 - 2⁶ = 231869947 is a prime.

It is a super-2 number, since 2×231870011² = 107527404002280242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231870017) 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, 1025861 + ... + 1026086.

It is an arithmetic number, because the mean of its divisors is an integer number (58480518).

Almost surely, 2^231870011 is an apocalyptic number.

231870011 is a deficient number, since it is larger than the sum of its proper divisors (2052061).

231870011 is a wasteful number, since it uses less digits than its factorization.

231870011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2052060.

The product of its (nonzero) digits is 336, while the sum is 23.

The square root of 231870011 is about 15227.2785158741. The cubic root of 231870011 is about 614.3485829523.

The spelling of 231870011 in words is "two hundred thirty-one million, eight hundred seventy thousand, eleven".