231421421340 has 144 divisors (see below), whose sum is σ = 731037355776. Its totient is φ = 59192985600.

The previous prime is 231421421299. The next prime is 231421421381. The reversal of 231421421340 is 43124124132.

231421421340 is a `hidden beast` number, since 2 + 314 + 2 + 1 + 4 + 2 + 1 + 340 = 666.

It is an interprime number because it is at equal distance from previous prime (231421421299) and next prime (231421421381).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 447030 + ... + 814050.

It is an arithmetic number, because the mean of its divisors is an integer number (5076648304).

Almost surely, 2^231421421340 is an apocalyptic number.

231421421340 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 231421421340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (365518677888).

231421421340 is an abundant number, since it is smaller than the sum of its proper divisors (499615934436).

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

231421421340 is a wasteful number, since it uses less digits than its factorization.

231421421340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 367180 (or 367175 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

Adding to 231421421340 its reverse (43124124132), we get a palindrome (274545545472).

The spelling of 231421421340 in words is "two hundred thirty-one billion, four hundred twenty-one million, four hundred twenty-one thousand, three hundred forty".