231115001 has 4 divisors (see below), whose sum is σ = 248893092. Its totient is φ = 213336912.

The previous prime is 231114979. The next prime is 231115009. The reversal of 231115001 is 100511132.

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

It can be written as a sum of positive squares in 2 ways, for example, as 85285225 + 145829776 = 9235^2 + 12076^2 .

It is a cyclic number.

It is not a de Polignac number, because 231115001 - 2¹⁰ = 231113977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231115009) 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, 8889026 + ... + 8889051.

It is an arithmetic number, because the mean of its divisors is an integer number (62223273).

Almost surely, 2^231115001 is an apocalyptic number.

It is an amenable number.

231115001 is a deficient number, since it is larger than the sum of its proper divisors (17778091).

231115001 is a wasteful number, since it uses less digits than its factorization.

231115001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17778090.

The product of its (nonzero) digits is 30, while the sum is 14.

The square root of 231115001 is about 15202.4669379677. The cubic root of 231115001 is about 613.6810484688.

Adding to 231115001 its reverse (100511132), we get a palindrome (331626133).

The spelling of 231115001 in words is "two hundred thirty-one million, one hundred fifteen thousand, one".