231011013 has 16 divisors (see below), whose sum is σ = 319852800. Its totient is φ = 148128960.

The previous prime is 231011009. The next prime is 231011021. The reversal of 231011013 is 310110132.

It is not a de Polignac number, because 231011013 - 2² = 231011009 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 231011013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231011023) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18468 + ... + 28338.

It is an arithmetic number, because the mean of its divisors is an integer number (19990800).

Almost surely, 2^231011013 is an apocalyptic number.

It is an amenable number.

231011013 is a deficient number, since it is larger than the sum of its proper divisors (88841787).

231011013 is a wasteful number, since it uses less digits than its factorization.

231011013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10172.

The product of its (nonzero) digits is 18, while the sum is 12.

The square root of 231011013 is about 15199.0464503534. The cubic root of 231011013 is about 613.5889946745.

Adding to 231011013 its reverse (310110132), we get a palindrome (541121145).

It can be divided in two parts, 2 and 31011013, that multiplied together give a palindrome (62022026).

The spelling of 231011013 in words is "two hundred thirty-one million, eleven thousand, thirteen".