231011340 has 48 divisors (see below), whose sum is σ = 739237632. Its totient is φ = 52802496.

The previous prime is 231011321. The next prime is 231011353. The reversal of 231011340 is 43110132.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 274594 + ... + 275433.

It is an arithmetic number, because the mean of its divisors is an integer number (15400784).

Almost surely, 2^231011340 is an apocalyptic number.

231011340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231011340 is an abundant number, since it is smaller than the sum of its proper divisors (508226292).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

231011340 is a wasteful number, since it uses less digits than its factorization.

231011340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 550046 (or 550044 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 231011340 is about 15199.0572076034. The cubic root of 231011340 is about 613.5892841895.

Adding to 231011340 its reverse (43110132), we get a palindrome (274121472).

The spelling of 231011340 in words is "two hundred thirty-one million, eleven thousand, three hundred forty".