231011385 has 48 divisors (see below), whose sum is σ = 430230528. Its totient is φ = 105402880.

The previous prime is 231011383. The next prime is 231011393. The reversal of 231011385 is 583110132.

It is not a de Polignac number, because 231011385 - 2¹ = 231011383 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231011381) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 27112 + ... + 34598.

It is an arithmetic number, because the mean of its divisors is an integer number (8963136).

Almost surely, 2^231011385 is an apocalyptic number.

It is an amenable number.

231011385 is a deficient number, since it is larger than the sum of its proper divisors (199219143).

231011385 is a wasteful number, since it uses less digits than its factorization.

231011385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7534 (or 7523 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 24.

The square root of 231011385 is about 15199.0586879583. The cubic root of 231011385 is about 613.5893240310.

It can be divided in two parts, 2310 and 11385, that added together give a triangular number (13695 = T₁₆₅).

The spelling of 231011385 in words is "two hundred thirty-one million, eleven thousand, three hundred eighty-five".