231011001 has 24 divisors (see below), whose sum is σ = 370596960. Its totient is φ = 142157808.

The previous prime is 231010991. The next prime is 231011009. The reversal of 231011001 is 100110132.

It is not a de Polignac number, because 231011001 - 2¹³ = 231002809 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (231011009) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20751 + ... + 29876.

It is an arithmetic number, because the mean of its divisors is an integer number (15441540).

Almost surely, 2^231011001 is an apocalyptic number.

It is an amenable number.

231011001 is a deficient number, since it is larger than the sum of its proper divisors (139585959).

231011001 is a wasteful number, since it uses less digits than its factorization.

231011001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50662 (or 50643 counting only the distinct ones).

The product of its (nonzero) digits is 6, while the sum is 9.

The square root of 231011001 is about 15199.0460555918. The cubic root of 231011001 is about 613.5889840501.

Adding to 231011001 its reverse (100110132), we get a palindrome (331121133).

The spelling of 231011001 in words is "two hundred thirty-one million, eleven thousand, one".