133431310220 has 72 divisors (see below), whose sum is σ = 305735245200. Its totient is φ = 48890699520.

The previous prime is 133431310219. The next prime is 133431310267. The reversal of 133431310220 is 22013134331.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 292106 + ... + 593454.

It is an arithmetic number, because the mean of its divisors is an integer number (4246322850).

Almost surely, 2^133431310220 is an apocalyptic number.

133431310220 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 133431310220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (152867622600).

133431310220 is an abundant number, since it is smaller than the sum of its proper divisors (172303934980).

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

133431310220 is a wasteful number, since it uses less digits than its factorization.

133431310220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 301515 (or 301500 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 133431310220 its reverse (22013134331), we get a palindrome (155444444551).

The spelling of 133431310220 in words is "one hundred thirty-three billion, four hundred thirty-one million, three hundred ten thousand, two hundred twenty".