131223454000 has 80 divisors (see below), whose sum is σ = 317431558080. Its totient is φ = 52467340800.

The previous prime is 131223453997. The next prime is 131223454007. The reversal of 131223454000 is 454322131.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (25).

It is not an unprimeable number, because it can be changed into a prime (131223454007) 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, 5253541 + ... + 5278459.

It is an arithmetic number, because the mean of its divisors is an integer number (3967894476).

Almost surely, 2^131223454000 is an apocalyptic number.

131223454000 is a gapful number since it is divisible by the number (10) 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 131223454000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (158715779040).

131223454000 is an abundant number, since it is smaller than the sum of its proper divisors (186208104080).

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

131223454000 is a wasteful number, since it uses less digits than its factorization.

131223454000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27575 (or 27559 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 25.

Adding to 131223454000 its reverse (454322131), we get a palindrome (131677776131).

The spelling of 131223454000 in words is "one hundred thirty-one billion, two hundred twenty-three million, four hundred fifty-four thousand".