231444345340 has 48 divisors (see below), whose sum is σ = 527541783552. Its totient is φ = 84783476736.

The previous prime is 231444345299. The next prime is 231444345343. The reversal of 231444345340 is 43543444132.

It is a super-2 number, since 2×231444345340² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 231444345340.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231444345343) 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, 3471589 + ... + 3537628.

It is an arithmetic number, because the mean of its divisors is an integer number (10990453824).

Almost surely, 2^231444345340 is an apocalyptic number.

231444345340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231444345340 is an abundant number, since it is smaller than the sum of its proper divisors (296097438212).

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

231444345340 is a wasteful number, since it uses less digits than its factorization.

231444345340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7009366 (or 7009364 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 37.

Adding to 231444345340 its reverse (43543444132), we get a palindrome (274987789472).

The spelling of 231444345340 in words is "two hundred thirty-one billion, four hundred forty-four million, three hundred forty-five thousand, three hundred forty".