231520442111010 has 192 divisors, whose sum is σ = 649766564778240. Its totient is φ = 56857109829120.

The previous prime is 231520442110981. The next prime is 231520442111027. The reversal of 231520442111010 is 10111244025132.

231520442111010 is a `hidden beast` number, since 2 + 3 + 1 + 520 + 4 + 4 + 21 + 110 + 1 + 0 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 891303672 + ... + 891563388.

It is an arithmetic number, because the mean of its divisors is an integer number (3384200858220).

Almost surely, 2^{231520442111010} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 231520442111010, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (324883282389120).

231520442111010 is an abundant number, since it is smaller than the sum of its proper divisors (418246122667230).

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

231520442111010 is a wasteful number, since it uses less digits than its factorization.

231520442111010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261513 (or 261510 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

Adding to 231520442111010 its reverse (10111244025132), we get a palindrome (241631686136142).

The spelling of 231520442111010 in words is "two hundred thirty-one trillion, five hundred twenty billion, four hundred forty-two million, one hundred eleven thousand, ten".