231440354460 has 384 divisors, whose sum is σ = 850375680000. Its totient is φ = 52227721728.

The previous prime is 231440354447. The next prime is 231440354477. The reversal of 231440354460 is 64453044132.

231440354460 is a `hidden beast` number, since 2 + 3 + 14 + 40 + 3 + 544 + 60 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 14624472 + ... + 14640288.

It is an arithmetic number, because the mean of its divisors is an integer number (2214520000).

Almost surely, 2^231440354460 is an apocalyptic number.

231440354460 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 231440354460, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (425187840000).

231440354460 is an abundant number, since it is smaller than the sum of its proper divisors (618935325540).

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

231440354460 is a wasteful number, since it uses less digits than its factorization.

231440354460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15935 (or 15913 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 36.

Adding to 231440354460 its reverse (64453044132), we get a palindrome (295893398592).

The spelling of 231440354460 in words is "two hundred thirty-one billion, four hundred forty million, three hundred fifty-four thousand, four hundred sixty".