231311320110 has 160 divisors (see below), whose sum is σ = 670120244640. Its totient is φ = 56912170752.

The previous prime is 231311320109. The next prime is 231311320117. The reversal of 231311320110 is 11023113132.

231311320110 is a `hidden beast` number, since 2 + 31 + 311 + 320 + 1 + 1 + 0 = 666.

It is a super-2 number, since 2×231311320110² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231311320117) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 33997969 + ... + 34004771.

It is an arithmetic number, because the mean of its divisors is an integer number (4188251529).

Almost surely, 2^231311320110 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 231311320110, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (335060122320).

231311320110 is an abundant number, since it is smaller than the sum of its proper divisors (438808924530).

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

231311320110 is a wasteful number, since it uses less digits than its factorization.

231311320110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10064 (or 10055 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

Adding to 231311320110 its reverse (11023113132), we get a palindrome (242334433242).

The spelling of 231311320110 in words is "two hundred thirty-one billion, three hundred eleven million, three hundred twenty thousand, one hundred ten".